Houston Astros relief pitcher Phil Maton will be unavailable for the MLB postseason because he broke a finger punching a locker.

Maton revealed Tuesday he suffered a fracture to his right pinkie after he became frustrated when the Astros' lost their final game of the regular season.

The pitcher had surgery Monday to repair the fractured finger on his pitching hand.

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Astros pitcher reacts after giving up base hit

Phil Maton of the Houston Astros reacts to giving up a base hit to brother Nick Maton of the Philadelphia Phillies in the eighth inning at Minute Maid Park Oct. 5, 2022, in Houston. (Tim Warner/Getty Images)

The Astros had already said Maton and veteran reliever Will Smith had been left off the roster for the AL Division Series against the Seattle Mariners.

The 29-year-old Maton gave up two hits and two runs in the eighth inning of Houston’s 3-2 win over Philadelphia last week. One of those hits was by Phil Maton's brother, Nick Maton.

"I was upset with how my outing went, and it’s kind of shortsighted and ultimately selfish. And it’s one of those things that I hope doesn’t affect our team moving forward," Maton said Tuesday.

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Smith joined the roster after the Astros acquired him from the Braves at the MLB trade deadline. He had a 3.27 ERA over 24 appearances with Houston in the regular season. Maton had a 3.84 ERA in 67 games this year.

Justin Verlander walks toward the dugout

Houston Astros starting pitcher Justin Verlander walks toward the dugout after a workout ahead of Game 1 of baseball's American League Division Series, Monday, Oct. 10, 2022, in Houston. The Astros will play the Seattle Mariners Tuesday. (AP Photo/David J. Phillip)

Rookie right-hander Hunter Brown did make the ALDS roster along with 12 pitchers. The team also carried an extra position player, rookie infielder David Hensley, on the postseason roster.

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The rest of Houston’s pitchers are Justin Verlander, Framber Valdez, Lance McCullers Jr., Luis Garcia, Jose Urquidy, Cristian Javier, Ryne Stanek, Ryan Pressly, Bryan Abreu, Rafael Montero and Hector Neris. 

Houston Astros player pitches during game

Phil Maton of the Houston Astros pitches during a game against the Baltimore Orioles at Oriole Park at Camden Yards Sept. 23, 2022, in Baltimore. (Mitchell Layton/Getty Images)

Houston will carry two catchers, eight infielders and four outfielders against Seattle.

The Mariners will carry 12 pitchers, three catchers, five infielders, four outfielders and utility players Adam Frazier and Dylan Moore.

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Their pitching staff for this series includes Logan Gilbert, Luis Castillo, Diego Castillo, Matthew Boyd, Matt Festa, Matt Brash, George Kirby, Andres Munoz, Penn Murfee, Robbie Ray, Paul Sewald and Erik Swanson.

The Associated Press contributed to this report.