The option is reportedly worth $4.5 million, and the deal includes performance bonuses that could enhance its value in each of the next two seasons.
Oh is expected to be in the mix for the Rangers' closer opening with the team's primary ninth-inning option last season, Matt Bush, expected to get a chance to crack the rotation this spring. Left-hander Alex Claudio, who saved 11 games for Texas last season, could have the inside track on the closing job.
Oh, 35, shined as the Cardinals' closer during his rookie season in 2016, saving 19 games to go with a 1.92 ERA. He took a big step back in 2017, however, posting a 4.10 ERA and losing his hold on the closer role in June.
In all, Oh saved 20 games in 24 opportunities last year and is 39-for-47 in save opportunities in his two major league campaigns.
Oh, nicknamed "The Final Boss," has an extensive history of closing experience in his time overseas. Between 11 seasons in the Korean Baseball Organization (nine) and Japan's Central League (two), he amassed 357 saves and a 1.81 ERA.
--Field Level Media