The Rangers are back to looking for a closer.

The club broke off negotiations with Korean pitcher Seung Hwan Oh Saturday, a source said. The club had agreed to a one-year contract with the reliever, pending a physical, more than a week ago. But, according to a source, there were disconcerting issues that came up on the MRI of his arm. The deal had reportedly initially called for a $2.75 million contract and included a team option for 2019. There were also performance bonuses.

Rangers GM Jon Daniels declined to comment on the status of Oh.

The Rangers had sought Oh, 35, as a possible closing option. He converted 39 of 47 saves over the the last two years with St. Louis. Though he bounced in and out of the closer's role last year due to ineffectiveness, he never went on the DL. He did miss two weeks in September, when rosters had already been expanded, due to a hamstring issue.