Matt Lindstrom becomes the head of the bullpen committee in Gregg's absence, though lefty Arthur Rhodes might get some matchup-driven looks and Joe Nelson is another option. If you have one shot to take here and really need saves, go with Lindstrom, but he's still very much a work in progress and your expectations should be modest.
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Kevin Gregg's struggles were discussed in Friday night's closing time; today we have an explanation. He's been battling left knee soreness according to the South Florida Sun-Sentinel, and the club has decided to shut him down indefinitely (3-5 days of rest, then side work, then hopefully a return).