Plawecki, 32, becomes a free agent and can try to catch on with a team in the playoff hunt that needs depth at catcher. The deadline to add playoff-eligible players is Sept. 1.
His release was posted on the minor league baseball transactions page.
Plawecki has had trouble sticking with a team after he became a free agent in November. He has been in the Washington, Pittsburgh and San Diego organizations this season, and the Rangers bought his contract from the Padres on July 28. He has not appeared in a major league game in 2023.
He played in 10 games with Round Rock, hitting .294.