Sox recall lefty starter Castro

The Red Sox have recalled left-handed starter Fabio Castro and will send reliever Scott Atchison to Pawtucket.

The 25-year-old Castro pitched well in his first start for the PawSox this season, giving up 1 run over 4.0 innings with 4 strikeouts. However, he has had a rocky go of things since, posting an ERA of 12.00 in his last two starts.

Last season in Toronto's farm system, Castro made 29 starts split between Double-A and Triple-A and finished with an ERA of 4.01. He has 30 career appearances at the big league level.

Castro was scheduled to start for Pawtucket on Tuesday. However, Boston's bullpen has been heavily taxed over the past few games, leading them to need an extra arm. He will likely serve as insurance in case Clay Buchholz is unable to pitch deep into the game.

Atchison, 34, went 0-1 with an ERA of 6.10 in 7 relief appearances for Boston.

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