Randy Wolf doesn't really know what has been wrong with him this season, and understands why the Milwaukee Brewers released him on Wednesday. Brewers general manager Doug Melvin and manager Ron Roenicke both said Wolf has something left to offer other teams. "It's a really tough pill to swallow," Wolf said. The 14-year veteran was 3-10 with a 5.69 ERA in 24 starts this season, the final year of a three-year, $29.75 million contract he signed with Milwaukee at the 2009 Winter Meetings. Shaun Marcum is returning from the disabled list, and the team intends to use September as a training ground for some younger starting pitchers.