Top Prospects: Keller, PIT
January 14, 2019 | 00:00:48
2019 MLB.com Top Prospects: Mitch Keller touched 99 mph in his one-inning Futures Game start and often touches 97-98 mph regularly in starts
2019 MLB.com Top Prospects: Mitch Keller touched 99 mph in his one-inning Futures Game start and often touches 97-98 mph regularly in starts