Rookie cornerback Marcus Peters made two interceptions, including one that he returned for a 90-yard pick-six touchdown, to help lead the Kansas City Chiefs to a 34-14 win over the Baltimore Ravens on Dec. 20 at M&T Bank Stadium in Baltimore, Md. The win advanced the Chiefs to a 9-5 overall record while dropping the Ravens overall record to 4-10.

Baltimore Ravens wide receiver Kamar Aiken (11) runs past Kansas City Chiefs defenders for a touchdown in the first half of an NFL football game, Sunday, Dec. 20, 2015, in Baltimore. (AP Photo/Nick Wass)

Baltimore Ravens wide receiver Kamar Aiken (11) runs past Kansas City Chiefs defenders for a touchdown in the first half of an NFL football game, Sunday, Dec. 20, 2015, in Baltimore. (AP Photo/Nick Wass)

Baltimore committed three turnovers and several other mistakes that cost them the opportunity of playing spoiler to the better Kansas City team. During the Chiefs’ first offensive possession of the game, the Ravens stopped K.C. on a third down; however, a late hit penalty committed by Ravens safety Anthony Levine automatically gave the Chiefs a new set of downs and they scored a long touchdown run not long after to take a 7-0 lead.

The Ravens tied the score at 7-7 with a touchdown pass from quarterback Jimmy Clausen and had an opportunity to take the lead after Clausen drove the offense down the field a couple possessions later. But Ravens running back Buck Allen fumbled in the red zone, allowing Chiefs safety Tyvon Branch to scoop the ball up and run it back for a 73-yard touchdown, giving K.C. the 14-7 lead instead.

Baltimore Ravens wide receiver Jeremy Butler (17) makes a catch in front of Kansas City Chiefs strong safety Ron Parker in the second half of an NFL football game, Sunday, Dec. 20, 2015, in Baltimore. (AP Photo/Gail Burton)

The Chiefs later extended their lead to 21-7 in the second quarter after the Ravens decided to try a fake punt run deep in their own field on a fourth-down-and-nine scenario. Ravens punter Sam Koch picked up only 7 yards on the fake punt run so the Chiefs took over on offense already in great scoring position.

Baltimore trailed, 24-14, at halftime—Clausen connected with receiver Kamar Aiken on a 48-yard Hail Mary touchdown pass right before the halfway break.

The Ravens tried to keep the score tight in the second half but the game was put away in the fourth quarter when Peters took advantage of a Ravens receiver who fell down on a route. With the receiver down, a Clausen pass sailed right into Peters’ hands and he was able to run it back 90 yards for the game-deciding score.

Clausen completed 26 of 45 pass attempts for 281 yards, two touchdowns and two interceptions. Aiken led all receivers with eight catches for 128 yards.

Chiefs quarterback Alex Smith completed 21 of 25 passes for 171 yards and a touchdown.

Next – Baltimore will host the Pittsburgh Steelers on Dec. 27. Kickoff set for 1 p.m. Eastern