Continuing a month-long series analyzing players who are on the Buffalo Bills' roster bubble and where they potentially fit in 2015:

Name: John Conner

Position: Fullback

Age: 28

2014 stats: 12 games (3 starts), 6 rushes (20 yards), 2 catches (35 yards, 1 touchdown)

Chance of making 53-man roster: 35 percent

Why he should make it: "The Terminator" has an obvious ally in his quest to make the Bills' 53-man roster: Coach Rex Ryan, who coached Conner for his first three seasons with the Jets and brought him back for another tour of duty last season. Ryan's familiarity with Conner could well give him an advantage over a fifth running back (Bryce Brown) or a fourth tight end (Chris Gragg). If Ryan feels Conner is a better special teams player than Anthony Dixon, that could also lead to Conner making the squad over Dixon. Ryan kept open the possibility of keeping two fullbacks when he signed Conner and, barring an injury to Jerome Felton, that would be the only way Conner makes the roster but it's a possibility that can't be easily dismissed given the team's ground-and-pound philosophy.

Why he shouldn't make it: Does a modern NFL team really need two fullbacks? Most teams won't even carry one fullback this season, and the Bills already have their guy in Felton, who became the NFL's second-highest paid fullback upon his signing. Unless Conner is a top-notch special teams player, keeping him on the 53-man roster seems like a waste, especially given that MarQueis Gray, Charles Clay and Dixon could all play fullback in a pinch. Ryan kept two fullbacks with the Jets early in Conner's career -- with Pro Bowler Tony Richardson ahead of him -- but this is 2015 and the Bills have talented players elsewhere on their roster that would get pushed off if Conner sticks. The odds are against him making the cut.

Closest competition: Gragg, Brown, Dixon