Baltimore signed Yoon to a three-year deal before the season. Their total financial commitment was minimal, at $5.575MM guaranteed, but they were surely still hoping for better results than they’ve gotten so far. Yoon has pitched 90 2/3 innings for Triple-A Norfolk, posting a 5.56 ERA with 6.4 K/9 and 2.4 BB/9. He has not yet pitched in the big leagues. The Orioles owe him $1.75MM in 2015 and $2.4MM in 2016.
Yoon was a standout in Korea, but was widely regarded as having less upside than, for example, Hyun-jin Ryu, who has had success with the Dodgers. Yoon was coming off a 2013 shoulder injury and did not have dominating stuff.
The O’s designated Phelps for assignment to make room for Miguel Gonzalez earlier this week. The former Indians prospect hit .258/.358/.380 in 395 plate appearances for Norfolk this season.