DENVER — On the coldest day for a Broncos game in September or October since Oct. 19, 1969, the Broncos could not find enough consistent heat on offense or defense to snap their losing streak, falling 23-20 to the undefeated Los Angeles Rams on Sunday.
The Broncos never led, as the Rams took a 3-0 lead 3:37 into the game on a 26-yard Cairo Santos field goal and held the edge throughout the game, withstanding a late Denver rally. The Broncos outscored the Rams 17-3 after falling behind 20-3, but a failed on-side kickoff attempt with 1:22 remaining dashed their hopes of completing the comeback.
Why did the Broncos fall?
Because penalties cost the Broncos at least seven points
Avoidable infractions were an issue for the Broncos in their three previous defeats after a 2-0 start, and they remained so once again, preventing them from keeping pace with the Rams in the first half.
The first saw a taunting penalty and instant replay turn a potential 45-yard Emmanuel Sanders touchdown into first-and-10 at the Rams 16-yard line, at which point the Broncos' drive stalled. Sanders appeared to have caught a 45-yard touchdown pass from Case Keenum off of a play-action fake to put the Broncos in front, but instant replay ruled him down at the Los Angeles 1-yard line.
Ordinarily, that would have given the Broncos first-and-goal at the 1, which they would have likely converted. But after catching the apparent touchdown, Sanders drew a taunting penalty. If the touchdown had stood, the officials would have enforced the penalty on the kickoff. But because replay moved the Broncos back to the 1, the flag was assessed from there, and the Broncos advanced just 6 yards on the following three plays, settling for a 28-yard Brandon McManus field goal.
"He knows better," Head Coach Vance Joseph said. "I didn't see what happened, but obviously it was a big penalty for us. We went from being on the 1-yard line to the 16-yard line. He can't do that, he knows that."
Midway through the second quarter, back-to-back holding penalties against Garett Bolles and Max Garcia turned first-and-10 at the Los Angeles 35-yard line into second-and-30 from the Denver 45-yard line, ending a promising scoring chance. Denver drove 40 yards in three plays to the Los Angeles 35 before the infractions, which cost the Broncos a chance for at least three points via another McManus field goal.
"We've got to figure out ways to not beat ourselves, and give us a chance to win the game," cornerback Chris Harris Jr. said. "We keep beating ourselves every week, and it's hard to win like that."
Because Todd Gurley rampaged through the Broncos
Gurley rushed for a career-high 208 yards, and the Rams gained 270 yards on the ground as the Broncos allowed consecutive 200-yard team rushing games for the first time since Dec. 12 and 19 of 2010 against the Cardinals and Raiders, respectively.
The Broncos allowed a 200-yard rusher for the second consecutive week for the first time in team history. This also marks the first time the Broncos have ever allowed a pair of 200-yard runners in a single season; they surrendered 219 yards to Jets running back Isaiah Crowell last week.
"As a defense, we were top-5 against the run last year, and we've got to get back to having that kind of mentality," safety Will Parks said.
Such games like the one Gurley had have been virtual guarantees of victory for the Rams, who have now won 13 consecutive games when Gurley amasses at least 140 yards from scrimmage.
The performance of the Rams' ground game allowed them to overcome a pedestrian performance from their aerial attack, as Denver's pass defense held Jared Goff to 201 gross yards on 14-of-28 passing. The Broncos also sacked Goff five times and intercepted him once.
"Today, that was part of our game plan: to make them run the ball," Harris said. "Their offense has been putting up [35] points a game, so we were just trying to figure out a way to slow them down. We held them to 23 points. Usually, when you [hold] them to 23 points, that's a good day versus the Rams."
Because the Rams sustained drives on third down
Los Angeles converted eight of its 17 third-down attempts Sunday, and followed one of its failed third downs with a 10-yard Gurley touchdown gallop to the left side on fourth-and-1. That meant the Rams extended their drives on 53 percent of their third-down attempts Sunday.
A crucial conversion came on third-and-1 with 7:30 remaining, as Gurley surged through a pair of defenders who met him in the backfield for the single yard the Rams needed to avoid going three-and-out. One snap later, Robert Woods ran 12 yards to the right side, moving the Rams near midfield and allowing them to drain more precious time from the clock, hindering the Broncos' attempt to rally.
Later in the drive, Goff found Robert Woods for 19 yards on a wide-receiver screen, allowing the Rams to convert a third-and-13 and move into goal-to-go. The Rams didn't reach the end zone on that series, but the pass set up a 21-yard Santos field goal that put the Broncos down two scores once again.
Photos from Broncos photographers during the Broncos' Week 6 game against Rams.

Derek Wolfe and Adam Gotsis during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Emmanuel Sanders during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Emmanuel Sanders during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Case Keenum during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Royce Freeman during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Bradley Chubb during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Shane Ray during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Emmanuel Sanders during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Denver Broncos linebacker Bradley Chubb (55) during the first half of the NFL game against the Los Angeles Rams, Sunday, October 14, 2018, in Denver. (Photo: Eric Lars Bakke)

Head Coach Vance Joseph during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Bradley Chubb and Von Miller during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Denver Broncos quarterback Case Keenum (4) during the first half of the NFL game against the Los Angeles Rams, Sunday, October 14, 2018, in Denver. (Photo: Eric Lars Bakke)

Matt LaCosse during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Pete Eklund

Brandon McManus during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Will Parks during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Denver Broncos linebacker Bradley Chubb (55) during the first half of the NFL game against the Los Angeles Rams, Sunday, October 14, 2018, in Denver. (Photo: Eric Lars Bakke)

Phillip Lindsay during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Denver Broncos linebacker Bradley Chubb (55) during the first half of the NFL game against the Los Angeles Rams, Sunday, October 14, 2018, in Denver. (Photo: Eric Lars Bakke)

Devontae Booker during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Pete Eklund

Emmanuel Sanders during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Denver Broncos defensive back Darian Stewart (26) during the first half of the NFL game against the Los Angeles Rams, Sunday, October 14, 2018, in Denver. (Photo: Eric Lars Bakke)

Denver Broncos running back Royce Freeman (28) during the first half of the NFL game against the Los Angeles Rams, Sunday, October 14, 2018, in Denver. (Photo: Eric Lars Bakke)

Denver Broncos tight end Matt LaCosse (83) during the first half of the NFL game against the Los Angeles Rams, Sunday, October 14, 2018, in Denver. (Photo: Eric Lars Bakke)

Phillip Lindsay during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Adam Gotsis during the first half of the NFL game against the Los Angeles Rams, Sunday, October 14, 2018, in Denver. (Photo: Eric Lars Bakke)

Todd Davis tries to wrap up Rams running back Todd Gurley during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Denver Broncos quarterback Case Keenum (4) during the first half of the NFL game against the Los Angeles Rams, Sunday, October 14, 2018, in Denver. (Photo: Eric Lars Bakke)

Chris Harris Jr. during the first half of the NFL game against the Los Angeles Rams, Sunday, October 14, 2018, in Denver. (Photo: Eric Lars Bakke)

Denver Broncos running back Devontae Booker (23) during the first half of the NFL game against the Los Angeles Rams, Sunday, October 14, 2018, in Denver. (Photo: Eric Lars Bakke)

Denver Broncos tight end Jeff Heuerman (82) during the first half of the NFL game against the Los Angeles Rams, Sunday, October 14, 2018, in Denver. (Photo: Eric Lars Bakke)

Jeff Heuerman during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Denver Broncos linebacker Todd Davis (51) during the second half of the NFL game against the Los Angeles Rams, Sunday, October 14, 2018, in Denver. (Photo: Eric Lars Bakke)

Tim Patrick during the second half of the game against the Rams on October 14, 2018, at Broncos Stadium at Mile High.

Phillip Lindsay rushes the ball during the second half of the game against the Rams on October 14, 2018, at Broncos Stadium at Mile High.

Denver Broncos wide receiver Demaryius Thomas (88) scores on a reception during the second half of the NFL game against the Los Angeles Rams, Sunday, October 14, 2018, in Denver. (Photo: Eric Lars Bakke)

Emmanuel Sanders reaches for the goal line during the second half of the game against the Rams on October 14, 2018, at Broncos Stadium at Mile High.

Von Miller and Rams defensive coordinator Wade Phillips after the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Case Keenum after the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Denver Broncos defensive back Darian Stewart (26) during the second half of the NFL game against the Los Angeles Rams, Sunday, October 14, 2018, in Denver. (Photo: Eric Lars Bakke)

Von Miller and Derek Wolfe during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Von Miller during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Denver Broncos quarterback Case Keenum (4) during the second half of the NFL game against the Los Angeles Rams, Sunday, October 14, 2018, in Denver. (Photo: Eric Lars Bakke)

Demaryius Thomas makes a catch during the second half of the game against the Rams on October 14, 2018, at Broncos Stadium at Mile High.

Denver Broncos wide receiver Emmanuel Sanders (10) celebrates his touchdown with Demaryius Thomas during the second half of the NFL game against the Los Angeles Rams, Sunday, October 14, 2018, in Denver. (Photo: Eric Lars Bakke)

Emmanuel Sanders during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Emmanuel Sanders during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Emmanuel Sanders tries to escape a tackle during the second half of the game against the Rams on October 14, 2018, at Broncos Stadium at Mile High.

Adam Gotsis and Bradley Chubb during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Demaryius Thomas during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Darian Stewart makes an interception during the second half of the game against the Rams on October 14, 2018, at Broncos Stadium at Mile High.

Derek Wolfe during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Denver Broncos wide receiver Demaryius Thomas (88) during the second half of the NFL game against the Los Angeles Rams, Sunday, October 14, 2018, in Denver. (Photo: Eric Lars Bakke)

Emmanuel Sanders and Chris Harris Jr. talk with former Broncos cornerback Aqib Talib after the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Von Miller during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Joe Jones during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Case Keenum during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Demaryius Thomas during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Emmanuel Sanders and Demaryius Thomas during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Denver Broncos wide receiver Courtland Sutton (14) during the second half of the NFL game against the Los Angeles Rams, Sunday, October 14, 2018, in Denver. (Photo: Eric Lars Bakke)

Demaryius Thomas during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Bradley Chubb during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Justin Simmons and Derek Wolfe during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Denver Broncos linebacker Todd Davis (51) during the second half of the NFL game against the Los Angeles Rams, Sunday, October 14, 2018, in Denver. (Photo: Eric Lars Bakke)

Case Keenum during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Brandon Marshall during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

The Rams make an interception during the game against the Los Angeles Rams during the game at Broncos Stadium at Mile High in Denver, Colorado, October 14, 2018. Photo by Gabriel Christus

Denver Broncos linebacker Bradley Chubb (55) during the second half of the NFL game against the Los Angeles Rams, Sunday, October 14, 2018, in Denver. (Photo: Eric Lars Bakke)