Petersen earned the save Wednesday against the Reds with a scoreless inning, giving up two hits and striking out two. Petersen entered the game with a three-run lead, and while he allowed back-to-back singles to Tyler Stephenson and Noelvi Marte, he ultimately got the job done. Petersen recorded the final out with runners on second and third when he struck out Matt McLain for his first save of the season. The 31-year-old right-hander has a 5.40 ERA and 6:4 K:BB through five innings to begin the season, and he'll revert to lower-leverage usage once closer Pete Fairbanks (personal) returns to the Marlins.
Michael Petersen: Everything you need to know
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Status
ACTIVESTATS
Michael Petersen Game Log 2026
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Regular SeasonDateOppResultIPKBBHBPCGSHOHRER5/9W 8-70.2000004335/7W 4-31.0100000005/5L 9-71.0200000004/28W 2-10.1000003114/27L 5-41.1210000004/22W 4-11.0300000004/19W 5-31.2100001114/14L 6-52.0100001004/11L 6-11.0000000004/8W 7-41.0200002004/4L 9-71.0030001324/3L 8-21.0110001113/30L 9-41.0100000003/29W 4-31.020000000
Regular Season Totals 13.61650001398
Michael Petersen Splits 2026
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SplitsGSIPWLERAKBBHBPCGHRERSVOSAVGHR
Overall 014.1110.016500965110.1731Home 07.2100.012000311110.1150Away 06.2010.04500654000.2311Day 05.2100.07100222000.1051Night 08.2010.09400743110.2120vs Righty 00.0000.07200440000.2000vs Lefty 00.0000.09300520000.1561March 02.0100.03000000000.0000April 010.1010.010500965110.2251May 02.0000.03000000000.0000Opponent vs NYY 0 2.0 0 1 0.0 1 4 0 0 2 4 3 0 0 0.250 1 vs BAL 0 2.0 0 0 0.0 3 0 0 0 0 0 0 0 0 0.000 0 vs COL 0 1.0 1 0 0.0 2 0 0 0 0 0 0 0 0 0.000 0 vs LAD 0 1.2 0 0 0.0 2 1 0 0 3 1 1 0 0 0.375 0 vs ATL 0 2.0 0 0 0.0 1 0 0 0 1 0 0 0 0 0.143 0 vs CWS 0 1.0 0 0 0.0 1 0 0 0 0 0 0 0 0 0.000 0 vs DET 0 1.0 0 0 0.0 0 0 0 0 0 0 0 0 0 0.000 0 vs STL 0 1.0 0 0 0.0 3 0 0 0 0 0 0 0 0 0.000 0 vs MIL 0 1.2 0 0 0.0 1 0 0 0 1 1 1 0 0 0.167 0 vs CIN 0 1.0 0 0 0.0 2 0 0 0 2 0 0 1 1 0.400 0 Venue @ Atlanta 0 2.0 0 0 0.0 1 0 0 0 1 0 0 0 0 0.143 0 @ New York 0 2.0 0 1 0.0 1 4 0 0 2 4 3 0 0 0.250 1 @ Detroit 0 1.0 0 0 0.0 0 0 0 0 0 0 0 0 0 0.000 0 @ Los Angeles 0 1.2 0 0 0.0 2 1 0 0 3 1 1 0 0 0.375 0 @ Miami 0 7.2 1 0 0.0 12 0 0 0 3 1 1 1 1 0.115 0
Michael Petersen Player Profile
Career History
Michael Petersen: Breaking News
Will begin season in majors
Petersen has claimed a spot in the Marlins' Opening Day bullpen, Christina De Nicola of MLB.com reports. The 31-year-old right-hander did enough this spring to stick around the 26-man roster, producing a 3.12 ERA and 7:3 K:BB over 8.2 Grapefruit League innings. Petersen should handle a low-leverage role after contributing a 4.00 ERA, 1.39 WHIP and 17:7 K:BB in 18 big-league innings last season split between Atlanta and Miami.
Blows save in extras
Petersen blew the save in Friday's extra-innings victory at Texas. He allowed two runs (one earned) on one hit and no walks over one inning with no strikeouts. The Miami right-hander blew the save when he conceded a two-run homer to Rowdy Tellez in the 10th to knot the game at 3-3. Petersen was assigned the task of converting his first save because the Marlins' saves leader, Calvin Faucher, had appeared in back-to-back games on Wednesday and Thursday. Petersen is unlikely to receive many future save opportunities and is expected to resume appearing in lower leverage situations. The 31-year-old has pitched to a 4.30 ERA and 1.50 WHIP across 14.2 frames with Atlanta and Miami this season.