Joshua Jefferson (ankle) out for Iowa State against Kentucky

Iowa State will be without its top player in Sunday's NCAA Tournament second-round game against Kentucky in St. Louis.

Senior forward Joshua Jefferson, a consensus second-team All-American, has been listed as out on the NCAA's official injury report.

Jefferson sprained his left ankle just 2:37 into Iowa State's 108-74 first-round victory over Tennessee State on Friday. Though X-rays showed no break, Jefferson returned to the bench in a walking boot and did not play again.

The 6-foot-8 forward averages 16.4 points...