By Tzvi Machlin It may be a few days before Tampa Bay Buccaneers QB Tom Brady announces whether he plans to retire or keep playing. But if his choice is the former, Bucs head coach Bruce Arians knows where his team would go from there. Per Rick Stroud of the Tampa Bay Times, Arians said that he would be comfortable moving forward with backups Blaine Gabbert and Kyle Trask. But he said that the Bucs would also try to “look behind Door No. 2” as they did with Brady in 2020. Going with Gabbert or Trask probably wouldn’t inspire much confidence in Bucs fans. Trask didn’t play at all as a rookie an…