Milwaukee Brewers first baseman Corey Hart hopes to be healthy and playing by the end of April after having right knee surgery last week, ESPN.com reported Friday. His recovery time is expected to be four months but he thinks he can return a month sooner than that prognosis. "If it takes a little longer then mid to end of May, but I feel good about end of April," Hart wrote in a text message to ESPN. "So basically like 2011, when I came back and hit 26 homers in five months." Mat Gamel is expected to fill in for Hart while he is out. Gamel missed all of last year with a torn ACL.