August 6, 2025 7:24 PM : O'Brien earned the save in Wednesday's 5-3 win over the Dodgers, issuing one walk over 1.1 scoreless innings.
Analysis: After Freddie Freeman singled with two outs in the eighth inning, O'Brien was called upon to set down Teoscar Hernandez to end the frame. The right-hander would come back out for the ninth, where he'd work around a two-out walk to earn his first major-league save. After allowing 10 earned runs in eight innings last season, O'Brien has emerged as one of the Cardinals' top bullpen options this year, posting a 1.84 ERA with a 1.19 WHIP and 29:14 K:BB across 29.1 innings. O'Brien should be in line for additional save chances down the stretch following the departures of Ryan Helsley and Phil Maton at the trade deadline.