SAN ANTONIO – The last time Ben Rothwell met with the media, he was in no mood to talk . Three months later, Rothwell (36-11 MMA, 6-5 UFC) can hardly contain himself as he approaches the first rematch of his 50-fight career, a second go-around with ex-UFC champ Andrei Arlovski (27-18 MMA, 16-12 UFC) at UFC on ESPN 4. “It’s just the whole (U.S. Anti-Doping Agency) thing bothered me so much,” Rothwell told reporters, including MMA Junkie, at a media day for Saturday’s event at AT&T Center. “It was just such a dark time for me, the whole situation.” What Rothwell is referring to is a two-year suspension he served when an out-of-competition drug test revealed an “anabolic androgenic steroid of exogenous origin.” He took the punishment and returned to face former WSOF and Bellator champ Blagoi Ivanov