49ers fear Verrett tore ACL in win over Lions

San Francisco 49ers head coach Kyle Shanahan said he fears cornerback Jason Verrett suffered a torn ACL in Sunday's 41-33 win over the Detroit Lions, according to Nick Wagoner of ESPN.

"It's crushing," said Shanahan.

Verrett has dealt with injuries throughout his career, finishing five of his seven previous seasons on injured reserve. But the veteran was able to stay healthy all of last year and became a key piece of the 49ers' secondary.

Shanahan suggested San Francisco will explore a reunion with cornerback Richard Sherman, who is a free agent after spending the last three campaigns with the NFC West club.

"We've discussed it," said Shanahan, according to Chris Biderman of the Sacramento Bee. "I've talked to Sherman, too. It's always a possibility."

Shanahan also said the team believes running back Raheem Mostert, who also left the Week 1 game with a knee injury, didn't suffer a torn ACL, according to Eric Branch of the San Francisco Chronicle. Mostert will undergo an MRI later Sunday.