No. 4 Texas suffered its second season-ending injury at running back Monday when true freshman Christian Clark tore an Achilles tendon in practice, the school announced on Tuesday. Texas said Clark will have surgery and will miss the remainder of the year, six days after announcing CJ Baxter, last year’s opening-game starter, will undergo season-ending knee surgery. The losses leave the Longhorns with only three scholarship running backs. Clark, a four-star recruit from Mountain Pointe High School in Phoenix, signed with Texas in December. Texas coach Steve Sarkisian told reporters Monday that Clark and Gibson, despite both fumbling in Saturday’s scrimmage in what he described as a “welcome to college football moment,” were coming along and were “further down the road than some may think.”