Milwaukee improved to 1-1 on the season, the Cardinals defeated the Brewers 11-5 on Friday.
Greinke is now 12-0 in his short Brewers career at Miller Park. Hart hit a solo homer in the second inning, and added two-run shot in the sixth. Rickie Weeks also hit his first home run of the season, a solo blast in the eighth.
The Brewers and Cardinals will finish their 3-game series Sunday afternoon at 1:10 P.M.