As part of a preview for New England Patriots training camp (first practice July 30) and to re-familiarize ourselves with the roster, it's time to bring back the "checking the locks" series. Today, we continue with running backs.

Sure-fire locks: LeGarrette Blount, Jonas Gray, Brandon Bolden

On the bubble: James White, Travaris Cadet, Dion Lewis, Tyler Gaffney

Analysis: Blount won’t count against the initial 53-man roster because he faces a one-game suspension to open the season, which strengthens Gray’s case to be in the “sure-fire lock” category even though his 2014 season ended with a lack of momentum. This also could help Gaffney, a slashing 220-pounder who spent last year on injured reserve after being claimed on waivers from Carolina. Meanwhile, Bolden lands in the "sure-fire lock" category because he is a valuable special teamer (Bill Belichick recently called him one of the team’s best offensive special teams players) who adds value as a backup who can fill in on first, second and third down. Perhaps most notable about the running back position is that White, Cadet and Lewis look to be closely bunched for the pass-catching role vacated by Shane Vereen at this juncture. As running backs coach Ivan Fears said in spring camps, the true test for them starts at training camp when there is contact and full-pads work. I could see that one going to either White, Cadet or Lewis based on what we've seen to this point, which is an incomplete picture.

Checking the locks 2015

Cornerbacks in transition