Thriving in fireman role, Michael Petersen preserves Marlins shutout, 3rd straight win

NEW YORK — It's extremely rare, if not unprecedented, that in a game featuring a scoreless start by Sandy Alcantara, he wasn't the Miami Marlins' most valuable pitcher. On Sunday, that title belonged to Michael Petersen. The journeyman right-hander put out a blazing fire in the bottom of the seventh inning, preserving Alcantara's shutout and earning his team-leading 18th hold of the season in a 2-0 win over the New York Mets.

Marlins manager Clayton McCullough called upon Petersen with runners on second and third and his club clinging to a 1-0 advantage. In that moment, the Mets had an estimated win probability of 65%, per Baseball Savant.

Petersen issued a walk to Marcus Semien to load the bases, but then struck out Jorge Polanco and Francisco Alvarez, escaping the jam on an A.J. Ewing groundout. The Mets' win probability plunged to 25% after coming up empty.

"Great decision by the manager out there," Alcantara said postgame. "Bring in the best guy [for] the best moment."

"As he's continued to get these types of opportunities, we have seen (Petersen) really grow," McCullough said. "He's a very confident pitcher with good stuff...Not surprised that Mike is getting these type of outs for us."

Be Like Mike https://t.co/sgo5jcCEX4 pic.twitter.com/cUjG7YNczj

— Fish On First (@FishOnFirst) August 2, 2026

Petersen has performed well overall in his first year as a full-time big leaguer (3.13 ERA and 3.25 FIP in 46.0 IP), but he shines especially brightly when inheriting baserunners. Only two of the 22 runners left behind for him by fellow Marlins pitchers have come home.

Petersen takes that responsibility very seriously.

“There's not a worse feeling than coming in with someone else's runner in and cashing it," Petersen said. "Those guys are, in my mind, winning the World Series if they come through. My own score, I pitch like crap, that's on me. But when someone's been grinding and you come in and blow that, you feel like an *******. So I try really hard not to do that."

Interestingly enough, Petersen did not make a single appearance with inherited runners until May 15. McCullough explained that the right-hander's usage changed through a combination of his own success and the losses of various relievers due to injuries, a few of whom (such as Anthony Bender and Andrew Nardi) are still on the IL. Safe to say, Petersen will remain in a prominent role as long as he continues to be a reliable out-getter.

Petersen's outing was so stressful because the Marlins offense barely provided any support. They were held scoreless until Joe Mack's fifth-inning home run. Xavier Edwards drove in their only other run with an RBI single in the ninth.

Alcantara is on the verge of setting yet another Marlins franchise record. By recording at least seven outs in his next start, he'll surpass Ricky Nolasco in career innings pitched (Nolasco had 1,225.2 IP).

And now we wait. As Marlins players and coaches rest on Monday, front office staffers will be doing the exact opposite, discussing a wide variety of potential moves in advance of the 6:00 p.m. ET trade deadline.