The Red Sox optioned Buttrey to Triple-A Pawtucket on Sunday.

Buttrey was one of four pitchers on the 40-man roster that Boston sent back to minor-league camp. The right-hander wasn't a serious candidate for a bullpen job with the Red Sox after accruing a 4.81 ERA and 1.46 WHIP across 63.2 innings between Double-A Portland and Pawtucket last season.

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