49ers RB Jeff Wilson recently underwent surgery to repair a torn meniscus in his knee, NFL Network's Mike Garafolo reports. Wilson is expected to be sidelined 4 to 6 months, which keeps him out until sometime between mid-September and mid-November. He signed a fully guaranteed 1-year, $2 million deal this offseason, so Wilson's roster spot should be safe. But he's a candidate to open the season on the PUP list. We'll keep an eye on his rehab this summer, but Wilson isn't worth a pick in early fantasy drafts. His injury makes the 49ers backfield a bit less crowded, with Raheem Mostert, Wayne Gallman and rookies Trey Sermon and Elijah Mitchell now vying for snaps. The hype train is speeding down the tracks for Sermon, who's going in the 7th round of recent FFPC drafts.