Report: 49ers rookie Bosa has sprained ankle

An MRI exam on Wednesday revealed San Francisco 49ers rookie defensive end Nick Bosa has a sprained right ankle, NFL Network reported. The report added that Bosa might be held out of the four-week preseason as a precautionary measure.

NFL Network later reported that cornerback Jason Verrett, who also hurt his ankle at practice Wednesday, was diagnosed with a minor sprain after an MRI. Team trainers examined Bosa's lower right leg after the No. 2 overall pick was slow to get up following a running play Wednesday. He walked off under his own power and returned to the locker room.

Without providing specifics, defensive coordinator Robert Saleh told reporters he didn't think the injury was serious. Bosa, who missed part of the 49ers' offseason program with a hamstring injury, played only three games at Ohio State last season due to a core muscle injury.

Bosa registered 17 1/2 sacks and 29 tackles for loss in 29 games with the Buckeyes from 2016-18. Verrett joined the team on a one-year, $3.6 million deal in March. A former Pro Bowler, he has played in just 25 games through five NFL seasons, including just five games over the past three seasons with the Chargers due to knee and Achilles injuries.