Cardinals acquired RHP Riley O’Brien from the Mariners.
It’s presumably for cash or a low-level minor leaguer. O’Brien, 28, pitched briefly in the majors with the Reds in 2021 and the Mariners in 2022. Last season was his second since being moved to the pen, and he had a 2.29 ERA and an 86/31 K/BB ratio in 55 innings for Triple-A Tacoma. It wasn’t enough to get the Mariners to put him back on the 40-man, but the Cardinals thought it was worth grabbing him here instead of hoping to sign him as a minor league free agent.