The St. Louis Cardinals have demoted struggling pitcher Mitchell Boggs and promoted right-hander Carlos Martinez.
Martinez, 21, is a consensus Top 40 prospect among most analysts.
The Dominican has totaled just 83 innings at Double-A and has a 2.82 ERA, 7.3 K/9 and 2.5 BB/9 in 17 starts. In total, he has 277 strikeouts in 259 2/3 minor league innings.