Three weeks remain before the NFL’s window for free agency opens Mar. 13 at 4 p.m., and new Tampa Bay Buccaneers coach Bruce Arians and his staff have spent their first month on the job evaluating the team’s roster.



See, before the Bucs can decide on what to add, they must first figure out what to keep. So they’ll have to review not just the 20-plus free agents from last year’s team, including key starters on both sides of the ball, but several veterans whose contracts were framed to allow the team to move on with little or no salary-cap damage.



Tampa Bay has made just a single move so far, releasing defensive end Vinny Curry to free up $8 million in cap space. Even with that, the Bucs have only about $15 million in cap room, which ranks 25th out of the 32 NFL teams, though they can change that in a hurry by releasing any of their several big-money veterans.



How much of an overhaul might be ahead for the Bucs? When Arians took over a...