According to Clark Spencer of the Miami Herald, Matt Lindstrom's injury has prompted the Marlins to start shopping for relievers. Lindstrom will miss at least six weeks and the Marlins, who are a mere 2.0 games behind the division-leading Phillies, don't want to go that long without another arm.
Spencer mentions LaTroy Hawkins and George Sherrill as possible solutions, but says the Marlins wouldn't likely want to give up the players required to land Sherrill. I'll add Luis Ayala and Jon Switzer to the list, as both were just designated for assignment and could be acquired more easily.