Hader was reassigned to minor-league camp Monday.
Hader saw action in just two games with the Brewers this spring, but he held his own, giving up just one earned run and posting a 4:1 K:BB ratio over four innings. He is considered one of the Brewers' best pitching prospects after posting a 3.03 ERA and striking out 119 batters over 104 innings in 24 Double-A outings last season. Hader will turn 22 in early April, and having shown what he can do against Double-A hitters, the Brewers may provide him with an early present -- a promotion to Triple-A.