Baltimore Ravens quarterback Joe Flacco prepares to throw to a receiver in the first half of an NFL football game against the Denver Broncos, Sunday, Sept. 23, 2018, in Baltimore. (AP Photo/Nick Wass)

Denver Broncos quarterback Case Keenum, center, throws a pass as he is pressured by Baltimore Ravens linebacker Za'Darius Smith, right, in the first half of an NFL football game, Sunday, Sept. 23, 2018, in Baltimore. (AP Photo/Gail Burton)

Baltimore Ravens running back Alex Collins, center, celebrates his touchdown in the first half of an NFL football game against the Denver Broncos, Sunday, Sept. 23, 2018, in Baltimore. (AP Photo/Nick Wass)

Baltimore Ravens running back Javorius Allen, left, scores a touchdown in front of Denver Broncos linebacker Von Miller in the first half of an NFL football game, Sunday, Sept. 23, 2018, in Baltimore. (AP Photo/Gail Burton)

Baltimore Ravens kicker Justin Tucker gestures after making a field goal in the first half of an NFL football game against the Denver Broncos, Sunday, Sept. 23, 2018, in Baltimore. (AP Photo/Nick Wass)

Baltimore Ravens running back Javorius Allen, right, celebrates his touchdown with teammate Alex Collins in the second half of an NFL football game against the Denver Broncos, Sunday, Sept. 23, 2018, in Baltimore. (AP Photo/Nick Wass)

Denver Broncos quarterback Case Keenum, center, looks for a receiver as he is pressured by Baltimore Ravens linebackers Za'Darius Smith (90) and Matt Judon (99) in the first half of an NFL football game, Sunday, Sept. 23, 2018, in Baltimore. (AP Photo/Gail Burton)

Baltimore Ravens head coach John Harbaugh, left, watches the first half of an NFL football game against the Denver Broncos, Sunday, Sept. 23, 2018, in Baltimore. (AP Photo/Nick Wass)

Denver Broncos offensive guard Connor McGovern, left, and offensive tackle Garett Bolles walk off the field after an NFL football game against the Baltimore Ravens, Sunday, Sept. 23, 2018, in Baltimore. (AP Photo/Gail Burton)

Baltimore Ravens quarterback Joe Flacco, left, speaks with Denver Broncos quarterback Case Keenum after an NFL football game, Sunday, Sept. 23, 2018, in Baltimore. (AP Photo/Nick Wass)

Baltimore Ravens running back Alex Collins, center, rushes the ball in the second half of an NFL football game against the Denver Broncos, Sunday, Sept. 23, 2018, in Baltimore. (AP Photo/Nick Wass)