Boston, MA (Sports Network) - Boston optioned pitcher Byung-Hyun Kim to Triple-A Pawtucket after its 5-3 win over Cleveland on Tuesday.
Kim, 25, went 1-1 with a 6.17 earned run average in three starts for the Red Sox after being activated from the 15-day disabled list on April 29. He missed the first 19 games of the season with a right shoulder strain.
In his last start, a 10-6 loss to the Indians on Monday, Kim allowed six runs -- four earned -- in 3 1/3 innings.
Bronson Arroyo will take Kim's place in the rotation and start Saturday for the Red Sox in Toronto.