Patriots RB Dion Lewis needs second knee surgery, league source confirms. Timetable for his return is uncertain. Tore ACL last Nov. 8.

Related players: James White, LeGarrette Blount, Tyler Gaffney

This one stings, as Lewis was shaping up as a great value in the 4th/5th round after looking good in spring practices. It's not clear what sort of surgery Lewis needs. If it's a scope, he might only be out a month, but if they need to do a ligament repair, it will take longer. (Update: Adam Schefter described it as a "clean up" procedure, which makes it possible that he will return at some point in the season.) In the meantime, James White is likely to take his place in the lineup. White averaged 6.7 touches (including 4.7 catches on 6.4 T/G) for 53.1 yards and 0.57 touchdowns in seven games that Lewis was sidelined. That equates to solid RB1 numbers in PPR formats (RB2 in standard). He's not going to get the running work that Lewis would have, but he should take over the pass-catching role and turn in RB2 numbers in PPR formats. The news also gives LeGarrette Blount a bump, since he's likely to see a few extra carries assuming he remains in the "big back" role. Tyler Gaffney is pushing Blount for work, but Blount has run well in the preseason.