The Buccaneers will not pick up the fifth-year option on running back Doug Martin, meaning he will be an unrestricted free agent in 2016, per the Tampa Tribune.
Martin rushed for 1,454 yards in 2012, but since then has battled injury and ineffectiveness, falling short of 500 yards in each of the last two seasons.
Martin remains in line to be Tampa Bay's No. 1 rusher at the start of 2015, but he will have to prove himself in order to be rewarded with a new contract.