The St. Louis Cardinals have had a bullpen problem all season–and Luis Gastelum might be the answer. Gastelum, 24, is MLB Pipeline’s 21st-ranked prospect in the Cardinals system.So far this season, all he’s done is shove. His ERA through 40.1 innings in Triple-A Memphis sits at 2.45, and he’s striking out 9.8 batters per nine innings. In […] The post Cardinals Must Consider Promoting 24-Year-Old Reliever With Wicked Changeup appeared first on HEAVY.