HARTFORD, Conn. -- Crosstown rivals Lane Kiffin and Jim Mora stand on different sides in the debate about up-tempo offenses in college football.

Kiffin, the Southern California coach, is concerned about the possible safety ramifications of a style of play that crams an extra 20 plays in a 60-minute game.

"I think there is a conversation there," Kiffin said Wednesday as the Pac-12 held a mini-media day in Connecticut to go along with its coaches appearing on ESPN. "We're not going to hit as much in practice in season. We might change things in the spring, but at the same time we're increasing the number of plays."

UCLA's Mora, meanwhile, embraced fast-break football in his first season as a college head coach.

"If an offense substitutes then the official stands over the ball and the defense is allowed to substitute. So I think the rule is fine," said Mora, who was a defensive assistant and coordinator in the NFL before becoming a head coach with Atlanta and Seattle.

Alabama coach Nick Saban and Arkansas coach Bret Bielema have been the most high-profile coaches to suggest the up-tempo craze might not be in the best interest of the players, and that maybe something needs to be done to slow down the game.

Saban talked at the SEC media days about whether football was meant to be played as a continuous action game.

Mora said that after being around the game for 30 years, "I don't think there is a safety issue."

UCLA was 13th in the nation, and third in the Pac-12, in plays per game at 81.7. Arizona was tops in the conference at 83.2 and Oregon was second at 82.8. Arizona State gave the Pac-12 four teams in the national top-15 at 81.5.

"And there were games when I felt like we were going to slow. I'm yelling at (quarterback) Brett (Hundley), Snap it! Let's go! Move! Move!" Mora said. "I'm used to huddle. Break the huddle. Linemen walk up to the line of scrimmage, they kind of wiggle down into their stance and there's a little motion. The ball's snapped and everyone comes back to the huddle.