The Marlins could be losing patience with starting pitcher Chris Volstad. Volstad got knocked out early in Florida's win over the Cubs on Sunday, allowing four runs on six hits in just three innings of work. The outing was Volstad's shortest of the season. "I saw a young guy who's been - how long in the big leagues, three years? It's time for him to step up and get tough," Marlins manager Jack McKeon said. Volstad has posted a 9.69 ERA through his first 13 innings of work this month. He'll get the Mets at home this weekend. If he doesn't show progress, his rotation spot could be in jeopardy.