Arizona's Khalil Tate won't play against UCLA

Defenses have contended with a half-speed Khalil Tate in recent weeks because of an ankle injury that has bothered the Arizona quarterback since early in the season.

Wildcats coach Kevin Sumlin announced Tuesday that Tate would sit out his team’s game against the Bruins on Saturday at the Rose Bowl, the latest setback in an injury-marred season for the preseason Heisman Trophy candidate from Gardena Serra High.

“Well, we don’t have to chase the fastest kid in the country around,” Bruins coach Chip Kelly cracked.

Tate lost that designation when he hurt his left ankle Sept. 8 against Houston. He continued to play at less than full strength until getting sacked and reaggravating his injury last…