DENVER -- Chidera Uzo-Diribe is going to be a problem for left tackles all season.

Colorado's relentless junior defensive end lived up to the preseason hype with two sacks of Garrett Grayson and three tackles for loss in Saturday's opener.

Of course Uzo-Diribe left Sports Authority Field unsatisfied after CU's 22-17 loss to Colorado State at Sports Authority Field.

"I just wish all that would have counted to get the W," Uzo-Diribe said. "It's OK, we'll be ready for next week."

CU's coaching staff was very confident about its defensive line entering the season.

The unit has some solid experienced players, led by Uzo-Diribe, senior defensive tackle Will Pericak and junior nose tackle Nate Bonsu.

True freshman Josh Tupou also received a lot of verbal love from head coach Jon Embree over the past month.

The Buffs sacked Grayson three times but allowed the sophomore to throw momentum-changing touchdowns of 20 and 32 yards.

CSU made some adjustments to make sure Uzo-Diribe didn't completely dominate the Rocky Mountain Showdown.

"I felt like I was seeing tight end blocks a lot more as the game went on," Uzo-Diribe said. "They weren't leaving me with a lot of one-on-one blocks. That's part of the game."

Offenses will no doubt begin double-teaming Uzo-Diribe consistently as the season rolls on.

Kirk Poston, a surprise starter at left defensive end, and Juda Parker will have to take advantage of their one-on-one opportunities.


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CSU rushed for 125 net yards with 37 coming on a Donnell Alexander run in the fourth quarter.

"I thought we played all right. We could have done better and stopped the run a little bit better," Uzo-Diribe said. "We get back to work on Monday and start up with Sacramento State."

Polk, Henderson hurt

CU senior free safety Ray Polk, who has battled injuries throughout his career, left the game with an ankle injury in the first half.

"I think it's going to be a while regardless (of Monday's diagnosis) with him," Embree said.

Parker Orms, the starting nickel back, replaced Polk at free safety. The junior was called for a 15-yard penalty for targeting CSU wide receiver Lou Greenwood on a jarring hit.

On the next play, Joe Hansley scored a 32-yard touchdown on a screen pass to give the Rams a 16-14 lead.

Starting cornerback Greg Henderson also suffered an ankle injury. That led to three true freshmen -- Kenneth Crawley, Yuri Wright and Marques Mosley -- playing in the secondary at the same time.

Young herd unleashed

CU dressed 77 players for Saturday's game -- all eight of the team's seniors, 19 juniors, 24 sophomores and 26 freshmen (16 true, 10 redshirt).

A total of 13 freshmen (nine true) saw action against CSU.

Series update

CU leads the all-time series 61-21-2 and has a 7-5 edge in Denver after having its four-game win streak in the Mile High City snapped.

The Buffs are 44-34-3 all-time in Denver with a 21-16-2 record in neutral site games and a 16-9-1 record against the University of Denver.

CU has now outscored CSU 2,011 to 979 over the decades. The Rams are the first opponent that the Buffs have scored 2,000 points against.

Iowa State allowed CU to rack up 1,732 points when they were conference rivals, a distant second to CSU.

McCartney's view

Bill McCartney watched the Rocky Mountain Showdown from the press box as a member of the media.

The legendary coach of CU's national championship team will be a part of a weekly college football show every Friday (4 p.m. to 6 p.m.) this season on 102.3 FM in Denver.

Attendance count

The official attendance was 58,607 with CU selling 35,406 tickets, CSU selling 18,169 tickets and the Denver Broncos selling 5,032 tickets.

Notable

Offensive tackle David Bakhtiari, defensive tackle Will Pericak, free safety Ray Polk and quarterback Jordan Webb were named CU's captains. Embree will select captains on a week-by-week basis this season. ... During the pregame the Metro Denver Sports Commission and both universities honored 300 military veterans and their families as well as 200 firefighters who worked the front lines in Colorado this summer. ... Scouts from the Denver Broncos, New England Patriots, Baltimore Ravens and San Francisco 49ers watched Saturday's game from the press box.

Follow Ryan on Twitter: @RyanThorburn