Larison is part of the competition for the No. 3 running back role, Mike Reiss of ESPN.com reports.
Rhamondre Stevenson and TreVeyon Henderson are the Patriots' unquestioned top two backs, and Terrell Jennings (undisclosed) was the favorite for the primary depth role before being placed on injured reserve Thursday. Jennings' misfortune boosts Larison's chances of earning a spot on the 53-man roster, and he'll have to continue to battle Jam Miller, Hassan Haskins and JaMycal Hasty.