Game 5

Matchup: No. 3/4 Oklahoma (4-0) at Colorado (2-2)

Game time: Saturday, 11:30 a.m. at Folsom Field (53,750).

On the air: Fox Sports Net; KOA (850 AM).

Web site: www.soonersports.com

Last time

The Buffs trailed 10-0 going into the fourth quarter at then-No. 20 Oklahoma last year but were only able to muster a field goal. CU also gave up two fourth-quarter touchdowns to lose 24-3. CU surrendered only 271 yards of total offense but could manage only 113 when it had the ball.

The series

This is 58th meeting of a series that began Nov. 28, 1912, with a CU victory over the Sooners in Denver. Oklahoma leads 39-16-2, including a 16-8-2 mark in Boulder. Oklahoma has won the past five meetings.

The coach

Bob Stoops is 90-19 in his ninth season at Oklahoma. He is 5-1 against the Buffs with his only loss coming in 1999, his first season as coach of the Sooners.

The lowdown

OU leads the nation in scoring averaging 61.5 points per game and is third in total offense at 562 yards per game. ... OU is fourth in the nation against the run, allowing just 1.3 yards per carry. ... The Sooners are converting on third downs 52 percent of the time. ... In just four games, the Sooners already have 13 plays of 40 yards or more. ... The Sooners four main ball carriers all are averaging at least 4.8 yards per carry. Redshirt freshman running back DeMarco Murray has already scored eight touchdowns.

Who to know

QB Sam Bradford: The redshirt freshman from Oklahoma City has already thrown 14 touchdown passes with just two interceptions. He has completed 75 of 96 passes (78 percent). He is second in the nation with a passing efficiency rating of 215.4.

WR Juaquin Iglesias: The Sooners leading receiver with 27 catches for 444 yards. He scored his two touchdowns this year last week against Tulsa on plays of 40 and 46 yards.

DB Reggie Smith: Named the preseason Big 12 Conference player of the year in a media poll. The junior is the third leading tackler on the team and a dangerous weapon as a punt returner. He has played both cornerback and safety in his career.