Pictures of the Buccaneers' offensive linemen.
The Buccaneers generally keep seven offensive linemen active on game days, including the five starters and two reserves, one to back up the tackles and one to back up the three interior spots. That backup outside lineman is generally known as a "swing tackle" because, hopefully, he can comfortably fill in on either edge. Last year, that player was Gosder Cherilus, a former first-round pick with 116 career NFL starts. This year, it might be Leonard Wester, an undrafted free agent with 27 career NFL plays.
That's not to say that the Buccaneers have gotten worse behind starters Donovan Smith and Demar Dotson. Cherilus retired after the 2016 season and the coaching staff obviously thought very highly of Wester. It is not uncommon for a team to fashion a good portion of its OL depth out of lesser-known and often undrafted players. Wester was the Bucs' fourth tackle for all of last year, so he would seem to be next in line.
Other than Wester, the team's tackle depth on paper consists of undrafted rookies Korren Kirvin and Cole Gardner. That's a bit misleading, however. As noted above, Pamphile and Benenoch will likely be part of the consideration when it comes to filling in for Smith or Dotson; in fact, Pamphile started at right tackle in Week 16 last season when Dotson was unavailable.