Top Prospects: Keller, PIT
January 26, 2017 | 00:00:37
2017 MLB.com Top Prospects: Mitch Keller's fastball keeps on getting better, now sitting in the low-to-mid-90s
2017 MLB.com Top Prospects: Mitch Keller's fastball keeps on getting better, now sitting in the low-to-mid-90s