Miami Dolphins RB knowshon Moreno (knee) will undergo arthroscopic knee surgery this week, according to sources. Moreno is expected to miss four to five weeks.

Footballguys View: The Dolphins were the only team to reach out to Moreno this offseason. He was coming off a 1,500 all-purpose yardage season, so teams must have felt Moreno was too much of an injury risk. The Peyton Manning effect on his stats also had to play a role. Miami was hoping that Moreno could push Lamar Miller for the starting job. Now they may be looking at adding another veteran running back in free agency.
Dolphins | Knowshon Moreno will undergo knee surgery