49ers Rookie Corey Kiner Carted Off With Leg Injury

San Francisco 49ers rookie running back Corey Kiner exited Saturday’s preseason game after suffering an apparent lower-leg injury on a 19-yard run. Medical staff examined the undrafted free agent on the field before he was taken to the locker room on a cart for further evaluation of his left knee and high-ankle area. Kiner had been one of the surprises of training camp, earning first-team repetitions as the 49ers look to solidify depth behind their starting backfield. His status adds to a string of health setbacks that have thinned San Francisco’s skill-position group during the preseason and may prompt the club to explore additional options at running back before the regular season opens.