The defending national champion Commodores (49-19) earned two days off and would have to be beaten twice by either TCU (50-14) or LSU to be denied a second straight trip to the best-of-three finals. Those teams will play an elimination game Thursday.
Young (9-3) flummoxed Vanderbilt for six innings, striking out a career-high 12 batters. Wiel drove out the junior left-hander's 2-1 breaking ball just inside the left-field foul pole for his 15th homer of the season.
Pfeiffer (5-5) and Wright allowed five singles and walked four. Wright earned his fourth save.