The Marlins optioned Gibson to Triple-A Jacksonville on Friday.

Gibson has pitched well overall this season, but he gave up another run Thursday against Atlanta, marking his third straight appearance allowing at least one run. The lefty will be swapped out for a fresh arm in right-hander George Soriano, but Gibson figures to be on the short list to return the next time the Marlins need bullpen reinforcements.

Miller (forearm) was reinstated from the 15-day injured list Friday.

Miller will make his Brewers debut when he gets into a game, as he's healthy for the first time since early July. The veteran reliever was traded from Arizona to Milwaukee on July 31. Before sustaining the forearm strain, Miller tallied a 1.98 ERA, 10 saves and eight holds over 36.1 innings for the Diamondbacks. Miller should be in contention for setup work, as Trevor Megill has been outstanding in the closing role.

The Reds recalled Benschoter from Triple-A Louisville on Friday.

Benschoter was called up in early July for his first big-league stint, but he didn't get a chance to make his MLB debut before heading back down. The 27-year-old will get another crack at taking the mound for Cincinnati, replacing Yosver Zulueta in the bullpen. Benschoter has posted a 3.78 ERA in 66.2 innings with Louisville this year.

The Reds optioned Zulueta to Triple-A Louisville on Thursday.

Zulueta has been up and down between Louisville and the big-league club this season and has allowed three runs with a 3:2 K:BB over 5.1 innings spanning four appearances with the Reds. His spot on the 26-man roster will be taken by fellow righty reliever Sam Benschoter, who was promoted from Triple-A in a corresponding move.

Johnson (3-3) picked up the win Thursday over the Marlins, giving up a hit and striking out one in a scoreless seventh inning.

The right-hander held Miami in check with Atlanta down 6-5 and was rewarded when his squad took the lead for good in the bottom of the seventh. Johnson may have missed a chance to audition as the closer down the stretch when Raisel Iglesias didn't get traded, but Johnson remains a key high-leverage option for Atlanta. He's been scored upon just once since June 13, posting a 0.48 ERA, 0.75 WHIP and 19:3 K:BB over his last 19 appearances (18.2 innings) with two wins and five holds.

Gage will serve as the Giants' opener for Friday's game against Washington, Shayna Rubin of the San Francisco Chronicle reports.

Gage will likely handle the first inning or two of Friday's contest, with Kai-Wei Teng as the top candidate to serve as a bulk reliever. In seven appearances with the Giants this season, Gage hasn't allowed a run and owns an 8:3 K:BB across 9.1 innings.

Iglesias earned the save Thursday against the Marlins, working a perfect ninth inning with two strikeouts.

Called on to protect a two-run lead, Iglesias shut down the top of the Marlins order with ease. Over his last eight appearances, the veteran right-hander has posted a 1.13 ERA while allowing just five total baserunners. He's up to 15 saves on the season and should remain locked into the closer role after Atlanta refrained from moving him at the trade deadline.

Alverado (suspension) will begin a rehab assignment with Triple-A Lehigh Valley on Thursday.

Alvarado was handed an 80-game PED suspension in mid-May and is now closing in on his return. The reliever is eligible to be activated Aug. 19 and will make some appearances with Lehigh Valley to get back up to speed. However, the southpaw will not reclaim the closer role for the Phillies, who acquired Jhoan Duran at the trade deadline.

The Cardinals claimed Alcala off waivers from the Red Sox on Thursday.

Alcala has split time between the Twins and Red Sox this season, posting a 6.64 ERA and 46:23 K:BB over 40.2 frames. The 30-year-old reliever cannot be optioned to the minors, so he will go onto to the Cardinals' active roster. St. Louis will have to make a corresponding transaction once Alcala officially reports to the club.

The Brewers sent Zastryzny (ribs) to Triple-A Nashville on Thursday to begin a rehab assignment.

Zastryzny was pulled off his initial rehab assignment in late July following a setback with his rib stress reaction, but he's been cleared for game action again. The lefty reliever should be ready to rejoin the Brewers bullpen around mid-August if he can avoid another setback.