UCLA running back Jordon James will not play against Arizona on Saturday, Coach Jim Mora said.
James, who re-injured his right ankle against Colorado on Saturday, is UCLA's leading rusher with 471 yards. He was the nation's fifth-leading rusher when he injured his ankle against Utah in the Bruins' fourth game.
"Jordon has been limited to riding the [stationary] bike this week," Mora said. "The next guy has to step up."
The Bruins also will be without running back Steven Manfro (ankle). Paul Perkins has started in James' place. UCLA's running game received a boost from the return of Damien Thigpen, who had 38 yards in four carries against Colorado. Thigpen had missed much of the season while recovering from a knee injury.