BY MATTHEW VANTRYON | ASST. SPORTS EDITOR The Butler men’s basketball team (14-16, 4-14) celebrated senior day Saturday afternoon against Seton Hall (15-16, 6-12). Sophomore guard Kellen Dunham stole the show, and Butler rolled to a 71-54 victory. Dunham dominated for the Bulldogs in the opening minutes, connecting on 5-of-5 attempts from behind the arc…