Muema had 105 yards on 14 attempts, and Katz was 16 of 22 passing for 181 yards for the Aztecs (4-3, 2-1 Mountain West), who were not penalized in a game for the first time since 1973.
Conner Smith was 18 of 22 for 165 yards and an interception for the Rams (1-6, 0-3).
SDSU converted all three of Colorado State's turnovers into touchdowns, and scored another TD after the Rams gave the ball up on downs.
On the first play from scrimmage in the second half, Marquise Law fumbled for Colorado State, and Jake Fely recovered for the Aztecs. Two plays later, Katz scrambled to the end zone from 11 yards out to give SDSU a 24-7 lead.
Largent had two interceptions and Fely two sacks for the Aztecs, who have won seven of the last eight meetings between the teams.
Crimson Tide defensive line coach Bo Davis is leaving the school amid NCAA and school inquiries over potential recruiting violations, The Tuscaloosa News has reported.
SEC Network's Paul Finebaum discusses the Big 10's celebration after the satellite camp ban was lifted but the SEC is still dominant.
Nick Saban does a live interview with SportsCenter prior to the NFL draft in his car. He discusses the Alabama players in the draft tonight and how he will spend his time at the draft
On The Paul Finebaum Show, Marcus Spears ranks the top NFL prospects from the SEC.
Former Ohio State running back Ezekiel Elliott wears a cut off shirt on the red carpet, reminiscent of the way he wore his jersey with the Buckeyes in the 2014 season.
ESPN college football analyst Brock Huard joins the Paul Finebaum Show to discuss Alabama's Derrick Henry and Ryan Kelly in the NFL draft.