The Patriots have placed Stevenson (undisclosed) on the active/Non-Football Injury list, Mike Reiss of ESPN.com reports.

It's unclear what's keeping the rookie fourth-round pick off the field, but Stevenson can come off the list and practice at any time during training camp. Once he's deemed fit to rejoin his teammates, Stevenson will look to carve out a role in New England's backfield, which is currently headed by Damien Harris.