Backup quarterback Marcus Jackson rushed for two touchdowns and threw for another to lead TCU past Colorado State 24-12 Saturday night in Fort Worth, Texas.

Starter Andy Dalton suffered an apparent knee injury on TCU's opening drive. Jackson had a 4-yard touchdown run on his first play of the game.

Jackson was 11-for-26 passing for 137 yards and carried 17 times for 38 yards.

TCU (3-2, 1-1 Mountain West) played without defensive end Tommy Blake, who was placed on medical leave Tuesday for undisclosed reasons. Blake, who came into the season as a top NFL prospect, will miss at least one more game.

TCU's Aaron Brown, who has been slowed this season with a knee injury, rushed for 113 yards on 20 carries. It was his fifth career 100-yard rushing game.

Colorado State (0-4, 0-1) scored on its first possession when Jason Smith booted a 47-yard field goal.

Jackson was 0-for-3 passing in the first quarter but heated up in the second.

On TCU's season-best 90-yard drive, Jackson completed four passes for 73 yards. He connected with Shae Reagan on a 4-yard pass to put the Horned Frogs ahead 14-3.

Chris Manfredini's 19-yard field goal gave the Frogs a 17-3 halftime lead.

In the third quarter, TCU scored again when Jackson rolled out to his left for his second 4-yard touchdown run.

Colorado State finished the scoring on Smith's 27-yard field goal and Caleb Hanie's 54-yard touchdown pass to Damon Morton. The two-point conversion failed, leaving the score at 24-12 a minute into the fourth quarter.

NEVADA 27, UNLV 20: At Reno, Nev., Nick Graziano threw a 43-yard touchdown pass to Kyle Sammons with 27.5 seconds left as Nevada hung on to beat rival UNLV for the third year in a row. Graziano completed 20-of-38 passes for 330 yards and three touchdowns, including a 90-yard score to Mike McCoy in the first quarter, and a 15-yarder to Adam Bishop with 3:02 remaining for the Wolf Pack (2-2). UNLV (2-3) had tied the seesaw battle 20-20 with 1:02 left when Travis Dixon threw a 30-yard touchdown pass to Ryan Wolfe on fourth-and-10. Frank Summers rushed for 120 yards and a touchdown for UNLV and Wolfe caught six passes for 92 yards.

NAVY 31, AIR FORCE 20: At Annapolis, Md., Kaipo-Noa Kaheaku-Enhada ran for 101 yards and scored twice in the fourth quarter to lead Navy before a record crowd of 37,615 at Navy-Marine Corps Memorial Stadium. With Navy down 20-17 early in the fourth quarter, Kaheaku-Enhada scored on a 2-yard run on fourth down, putting Navy ahead 24-20 with 13:01 to play. Then, on Navy's next series, Kaheaku-Enhada broke loose on a 78-yard touchdown run to put the Midshipmen up 31-20 with 9:18 to play. The runs turned the tide in a game that saw the teams trade the lead through the first three quarters, and gave Navy (3-2) its fifth straight win over the Falcons (3-2).

NO. 24 CINCINNATI 52, SAN DIEGO ST. 23: At San Diego, the Bearcats more than lived up to their first national ranking in 31 years. Ben Mauk threw four touchdown passes in the second quarter and Cincinnati scored on six of its first seven possessions.