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Riley O'Brien
St. Louis Cardinals logo
Riley O'Brien
St. Louis Cardinals•Pitcher•#55
Bats: RThrows: RAge: 30Season: 2025

2025 Season Stats

ERA
2.45
W-L
3-1
IP
40.4
SO
43
WHIP
0.00
SummaryNews

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    Latest News

    12 articles

    Riley O'Brien

    Riley O'Brien

    STL • Pitcher • #55

    Recap

    about 2 months ago

    Riley O’Brien recorded one out to convert the save against the Giants on Tuesday.

    JoJo Romero had started the ninth inning, protecting a one-run lead for the Cardinals. He recorded two outs and allowed one baserunner before O’Brien was summoned to record the final out. O’Brien struck out the final batter to record his sixth save of the season.

    Riley O'Brien

    Riley O'Brien

    STL • Pitcher • #55

    Recap

    2 months ago

    Riley O’Brien tossed a clean ninth inning with one strikeout to record the save against the Reds on Tuesday.

    After JoJo Romero shut the Reds down in the eighth, O’Brien was called on to close things out in the ninth with a three-run lead. He tossed a clean frame, striking out one batter for his fifth save of the season. Expect O’Brien and Romero to operate in a matchup-based committee for save chances.

    Riley O'Brien

    Riley O'Brien

    STL • Pitcher • #55

    Recap

    2 months ago

    Riley O’Brien bounced back from his brutal blown save on Saturday, working a scoreless ninth to protect a one-run lead against the Brewers on Sunday afternoon.

    O’Brien was summoned with a one-run lead to protect in the ninth inning. He struck out Blake Perkins to start the inning and got Danny Jansen on a bounce out to first before issuing a two-out walk to Andruw Monasterio. Not to worry though, as he rallied to strike out Sal Frelick to close it out for the Cardinals. The 30-year-old right-hander now boasts a 2.13 ERA, 1.18 WHIP and a 40/20 K/BB ratio over 42 1/3 innings on the season while converting four of his first seven save opportunitites.

    Riley O'Brien

    Riley O'Brien

    STL • Pitcher • #55

    Recap

    2 months ago

    Riley O’Brien imploded in a save chance against the Brewers on Saturday night, giving up three runs on a pair of hits without recording a single out.

    The 30-year-old right-hander came on with a three-run lead to protect and immediately plunked Caleb Durbin and Andruw Monasterio to start the inning. Sal Frelick followed with an RBI double that pulled the Brewers to within two runs and put the tying runs in scoring position. Jackson Chourio followed with an RBI single that made it a one-run game, leading Cardinals’ skipper Oli Marmol to pull O’Brien from the burning building. The Cardinals continue to mix and match in the ninth inning, but this disaster could move O’Brien down in the pecking order for save chances.

    Riley O'Brien

    Riley O'Brien

    STL • Pitcher • #55

    Recap

    2 months ago

    Riley O’Brien recorded his third save with a scoreless ninth against the Giants on Sunday.

    Although he was dealing with shoulder tightness earlier this week, O’Brien has been allowed to pitch on back-to-back days. He got the ninth today after JoJo Romero was brought in to face Rafael Devers and the middle of the order in the eighth. Both relievers did their jobs well, as they generally have since Ryan Helsley got traded. Romero would still seem to be the favorite for saves in St. Louis.

    Riley O'Brien

    Riley O'Brien

    STL • Pitcher • #55

    Injury

    3 months ago

    Riley O’Brien won’t be available Monday after undergoing an MRI on his right shoulder.

    O’Brien hasn’t been placed on the injured list, so that’s a positive. Still, that might come based on what the MRI reveals. JoJo Romero is worth using in most leagues with the Cardinals’ primary closing alternative down. Kyle Leahy could also be an option in deeper formats.

    Source: John Denton

    Riley O'Brien

    Riley O'Brien

    STL • Pitcher • #55

    Recap

    3 months ago

    Riley O’Brien allowed one run on one hit in 1 2/3 innings while blowing a save against the Pirates on Monday.

    JoJo Romero was used in the eighth inning but allowed two baserunners, so O’Brien was called on with two runners on and one out in a one-run game. He induced an inning-ending double play and then came back into the game for the ninth inning. That inning didn’t go as well after O’Brien hit a batter and then allowed a game-tying double to blow his third save of the season. A walk-off home run by Alec Burleson allowed O’Brien to pick up the win, and this still appears to be a committe situation in St. Louis.

    Riley O'Brien

    Riley O'Brien

    STL • Pitcher • #55

    Recap

    3 months ago

    Riley O’Brien worked a hitless ninth against the Marlins for his second save on Tuesday.

    O’Brien missed out on a save chance last night because the Cardinals increased their lead from two runs to five in the top of the ninth. Tonight, they failed to add on, allowing O’Brien to protect a three-run lead. He seems to be the team’s top choice in the ninth for now. JoJo Romero again had the eighth tonight.

    Riley O'Brien

    Riley O'Brien

    STL • Pitcher • #55

    Recap

    4 months ago

    Riley O’Brien recorded the final four outs without allowing a run to earn his first major league save Wednesday against the Dodgers.

    O’Brien walked Max Muncy with two outs, but he then retired Alex Freeland to end the game. JoJo Romero got the win today for striking out Shohei Ohtani to end the seventh and retiring two in the eighth. Kyle Leahy, who was another candidate to close with Ryan Helsley gone, pitched 2 2/3 scoreless innings after replacing Matthew Liberatore in the fifth, striking out four along the way. Romero is probably the favorite for saves in St. Louis at the moment, but with the way Leahy is being used, O’Brien might be worth a roster spot in mixed leagues as the top alternative of Romero.

    Riley O'Brien

    Riley O'Brien

    STL • Pitcher • #55

    Transaction

    5 months ago

    Cardinals recalled RHP Riley O’Brien from Triple-A Memphis.

    O’Brien has been plenty effective in Triple-A this year, posting a 2.79 ERA and a 32/8 K/BB in 19 1/3 innings out of the Memphis bullpen, but he’s struggled to establish himself in the Cardinals pen. Since debuting last year, he has a 9.20 ERA with five homers allowed in 14 2/3 innings.

    Riley O'Brien

    Riley O'Brien

    STL • Pitcher • #55

    Transaction

    7 months ago

    Cardinals optioned RHP Riley O’Brien to Triple-A Memphis.

    O’Brien takes the relatively short flight to Memphis in order to create room on the active roster for a couple of new arms, with Matt Svanson also getting the boot from the active roster. O’Brien is nothing more than an up-and-down arm at this stage of his career.

    Riley O'Brien

    Riley O'Brien

    STL • Pitcher • #55

    Transaction

    7 months ago

    Cardinals recalled RHP Riley O’Brien from Triple-A Memphis.

    O’Brien will replace the recently demoted Ryan Fernandez in the Cardinals’ bullpen. The 30-year-old right-hander has made seven appearances at Triple-A Memphis this season, posting a 3.86 ERA, 1.14 WHIP and a 14/3 K/BB ratio over seven innings. Expect him to be used in a middle relief role by the Cardinals.