49ers RB Mostert to undergo season-ending surgery

San Francisco 49ers running back Raheem Mostert will undergo seasonending surgery on his knee after getting injured in the season opener. Coach Kyle Shanahan had said Mostert was expected to miss eight weeks because of chipped cartilage in his knee, but Mostert announced on his Twitter account Tuesday that he will miss the rest of the season. The injury to Mostert is the second season-ending injury suffered by a key 49ers player already this year after the 2020 season was derailed by injuries. Cornerback Jason Verrett tore the ACL in his right knee in the season opener at Detroit.