By Tzvi Machlin Of all the assistant coaches on Bruce Arians’ staff, offensive coordinator Byron Leftwich appears the most likely to get a head coaching job in 2022. And Arians is preparing for that possibility. According to Trevor Sikkema of Pro Football Focus, Arians addressed the possibility of Leftwich leaving this past Monday. Arians said that if Leftwich takes a job elsewhere, he will call offensive plays himself in 2022. The Tampa Bay Buccaneers head coach is no stranger to offensive play calling. It was Arians’ primary job for the better part of 30 years before he got his first NFL hea…