The Cardinals acquired Eagen, left-hander Sandro Santana and a player to be named later from the Diamondbacks on Monday in exchange for outfielder Lars Nootbaar.
Eagen is a better pitcher than his 4.95 ERA and 1.31 WHIP in 20 starts at Double-A this season would suggest, as he pitched half his games in Amarillo, one of the most hitter-friendly parks in the minors. On the positive side, Eagen has a strong 29.2 percent strikeout rate and a career-best 9.1 percent walk rate. The 6-foot-4 righty has been particularly effective over his last four starts, logging a 2.45 ERA, 0.95 WHIP and 28 strikeouts in 22 innings.