Many were surprised when San Francisco 49ers rookie running back Trey Sermon was a healthy scratch for their Week 1 contest against the Detroit Lions.

After Raheem Mostert suffered a season-ending knee injury, Kyle Shanahan and Co. have made their decision on Sermon for Week 2 after he showed “extra aggressiveness” this week for the 49ers, per ProFootballTalk.

“So what that told me is, ‘Hey, I didn’t like not dressing. I want to play football. So how do I do that? I don’t go and talk to people. I show people,'” McDaniel said, via Matt Barrows of TheAthletic.com. “That’s kind of the common denominator. Kyle always says to the players and coaches, ‘Don’t tell me, show me.’ And [Sermon] showed, I think, all of us that he really wants an opportunity, which he’ll get this Sunday.”

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Sermon was a third-round pick by the 49ers out of Ohio State and the rookie raised eyebrows with his excellent showings in the offseason. After being a healthy inactive in Week 1, he has clearly flipped the switch and the 49ers noticed.

San Francisco could take a large running back by committee approach with Mostert out for the year. It appears for now that Elijah Mitchell could see a lot of the carries for the 49ers after running for over 100 yards against the Lions in Week 1.

With Sermon now in the fold, it just adds another layer to the already dynamic offense that Shanahan has to work with for the 49ers. Don't be surprised to see Sermon get some run against the Eagles.