UPDATE (5:39pm PT on Sunday): 49ers running back Jerick McKinnon has been diagnosed with a right calf strain and will be re-evaluated in one week.

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UPDATE (4:09pm PT on Sunday): 49ers running back Jerick McKinnon got good news from the MRI results on his right knee and the scan showed "just a muscle strain" according to ESPN's Adam Schefter.

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SANTA CLARA – Running back Jerick McKinnon is scheduled to undergo an MRI on his right knee after he came up hobbling Sunday following a running play early in practice.

McKinnon was injured on the ninth play of practice, and on his third carry of a run-oriented drill. He was in obvious discomfort after the non-contact injury on an outside zone run. He grabbed behind his right knee.

After the 49ers’ medical staff checked him out for several minutes, McKinnon got to his feet and slapped hands with general manager John Lynch. McKinnon remained on the field to watch the final 90 minutes of practice.

Afterward, he signed autographs for members of the military in attendance. He said he felt fine, but the severity of McKinnon’s injury will not be known until the team receives the results of the MRI.

McKinnon, a fifth-year pro, signed a four-year, $30 million contract with the 49ers in the offseason. The 49ers targeted McKinnon in free agency without making any attempt to re-sign Carlos Hyde.

 

Backup running back Matt Breida is out for the remainder of training camp with a separated shoulder. Joe Williams also did not practice, as he was excused to attend the funeral of a relative. Raheem Mostert, Jeremy McNichols and undrafted rookie running back Jeff Wilson handled the running back duties after McKinnon's injury.