After a whirlwind of a rookie season, A.J. Epenesa is finally finding his groove at Buffalo Bills training camp and looks ready to meet the expectations many had for him following his selection in the second round of the 2020 NFL draft. His strong play in practices, coupled with a relentless offseason of training has teammates raving about his potential for the 2021 season. “A.J., from this offseason looks like a totally different player this year,” defensive tackle Ed Oliver said about his fellow linemate after seeing him through the first week of training camp. “He was here a lot this offseason working out. You can tell even with his get off, his awareness, everything.” A totally different player is just what Buffalo hopes to have in 2021 out of Epenesa, who had quite the roller coaster of a season in 2020. Not only did he miss out on OTAs and rookie minicamp due to a worldwide pandemic, but the former Iowa star was tasked with dropping a significant amount of weight in order to develop into the caliber of player Buffalo’s front office believed he could become. The 6-foot-5 pass rusher was a two-time All Big-10 selection after recording 86…