The Mariners designated O'Keefe for assignment Friday.
O'Keefe was booted off the Mariners' 40-man roster in order to make room for Kaleb Ort (elbow), who was claimed off waivers from Boston on Friday. O'Keefe is just 3-for-22 with two RBI in his major-league career, though his .238/.328/.504 Triple-A slash line from 2023 could get him claimed by another team in need of depth behind the plate.