LHP Mike Dunn (forearm), who missed Miami's first 51 games, was activated. He made 72 relief appearances for the Marlins last year and is the only lefty in the bullpen.

LHP Mike Dunn (forearm), who missed Miami's first 51 games, was activated. He made 72 relief appearances for Miami last year and is the only lefty in the Marlins bullpen. Dunn's presence will allow Marlins manager the ability to mix and match a bit with lefty and righty hitters. Prior to Dunn's activation, the Marlins this year had tried a couple of lefties with very little success -- Chris Narveson, Craig Breslow and Cody Ege.

LHP Mike Dunn (left forearm strain) threw another scoreless inning Sunday for high Class A Jupiter in his third rehab outing. He is expected to join the Miami bullpen at some point during the series with Pittsburgh that begins Monday. The Marlins don't have a left-handed reliever. Dunn, on the disabled list since the start of the season, struck out two and didn't allow a baserunner Sunday, throwing 13 of his 14 pitches for strikes.

LHP Mike Dunn (left forearm strain) struck out two in another scoreless inning Friday for Advanced Class-A Jupiter in his second rehab outing. He could be ready to return to the Miami bullpen during the homestand that begins Monday. The Marlins don't have a left-handed reliever.

LHP Mike Dunn was sent on a rehab assignment to Class A Jupiter. He pitched one inning Tuesday and gave up one hit and struck out one.

LHP Mike Dunn (strained forearm), who threw a bullpen session on Saturday, could return to action next week.But first, he will pitch in a few minor-league rehab games. Miami is the only team in the majors without a lefty in the bullpen.

LHP Mike Dunn (strained forearm), who threw a bullpen session on Saturday, could return to action next week after pitching in three or four minor league rehab games. Miami is the only team in the majors without a lefty in the bullpen, a role Dunn would immediately fill.

LHP Mike Dunn (strained forearm) could return in about 10 days. Dunn is badly needed by the Marlins, who do not have a left-hander in the bullpen.

LHP Mike Dunn (forearm) threw a bullpen session on Tuesday. The Marlins need Dunn as a veteran left-hander in their bullpen. The only lefty the Marlins currently have in their pen is Craig Breslow, and he has struggled with a 3.55 ERA.

LHP Mike Dunn, who has yet to pitch this season, threw for the first time Thursday. Manager Don Mattingly said Dunn is at least 30 days away from playing. Dunn was placed on the 15-day disabled list April 3 due to a forearm strain.

LHP Mike Dunn, out since March 25 with a strained right oblique, is not yet able to throw.

LHP Mike Dunn (left forearm inflammation) felt discomfort during a bullpen session and his return has been pushed back indefinitely. Dunn is 15 innings away from breaking the Marlins' record for career relief innings.

LHP Mike Dunn (left forearm inflammation) felt discomfort during a bullpen session and his return has been pushed back indefinitely.

LHP Mike Dunn, on the disabled list since the start of the season, had a second MRI on his strained left forearm Monday. The test found no structural damage, Dunn said.

LHP Mike Dunn (left forearm strain) had a setback during his most recent throwing session. Manager Don Mattingly said Tuesday that Dunn, who opened the season on the disabled list, "felt it grab" as he threw. Dunn will see team doctors in the coming days. An MRI administered last month detected no structural damage. This is the first trip to the disabled list for Dunn since he reached the big leagues in 2009.

LHP Mike Dunn (strained left forearm) experienced a setback during a throwing session and will see team doctors, manager Don Mattingly said.

LHP Mike Dunn was placed on the 15-day disabled list on Sunday due to a strained left forearm. Dunn underwent an MRI exam and no significant damage was uncovered. The move was made retroactive to March 25. It is the first time the durable Dunn has been on the disabled list during a major-league career that began in 2009. He has appeared in 354 games since the Marlins acquired him from the Atlanta Braves in 2010. He went 2-5 with a 4.50 ERA in 72 games (54 innings) last season.

Dunn finished the 2015 season with a disappointing 4.50 ERA and 1.39 WHIP over 54 innings for the Marlins.

The 30-year-old reliever remained a workhorse out of the Miami bullpen, logging 70+ appearances for the fourth time in the last five years and he finished with 20 holds, making it the third straight season he's collected 20+ holds. His overall numbers are down from the past two seasons, but it is difficult to find a significant skills regression that would prevent Dunn from bouncing back in 2016. Overall, Dunn's walk rate ticked up and he allowed a couple more home runs than in 2014 while his velocity and strikeout rates remained in line with career norms.

Dunn has registered a disappointing 4.34 ERA and 1.31 WHIP over 29 inning pitched this season, but made five straight scoreless appearance to close the first half.

Dunn had a very shaky start to the season, posting a 5.30 ERA in April and May, but has been heating up along with the summer weather. Since June 1, he's got a 2.61 ERA while re-establishing himself as a quality setup option for the Marlins and will continue to provide support as a late-inning bridge from the Miami rotation to closer A.J. Ramos.

Dunn took the loss Friday night, allowing one run on one hit while retiring just one hitter in the Marlins 5-3 loss to Atlanta.

Both Dunn and Bryan Morris were mentioned as possible closer options when Steve Cishek was removed from the role earlier this week, but both pitched in the eighth inning (and both allowed runs) which suggests A.J. Ramos will indeed get the first opportunity to step into the closer's gig.