The Rangers have struck a deal with free agent reliever Seung-hwan Oh, according to Ken Rosenthal of The Athletic (via Twitter). Terms of the pact, which won’t be finalized until Oh passes a physical, are not yet known. This makes for an interesting match given the open questions at the back of the Texas pen. Oh, a veteran Korean hurler, took over the closer’s role for the Cardinals during his debut MLB season of 2016. He opened the ensuing campaign with the same job after spinning 79 2/3 frames of 1.92 ERA ball, with 11.6 K/9 and 2.0 BB/9, but was not able to repeat his dominance. In 2017, Oh wound up posting a 4.10 ERA in 59 1/3 innings. The fall-off was not only evident in the results; Oh’s peripherals suffered across the board. In particular, his swinging strike rate dropped from an outstanding 18.0% to a still-strong 12.9%, taking his strikeout rate down to 8.2 K/9. His home run rate nearly tripled to 1.52 per nine; his groundball rate plummeted to 28.7%; and he surrendered a batting average on balls in play (.319) nearly fifty points north of his 2016 level.