Kelly will be called up to Boston on Friday and join the Red Sox in Oakland, Tim Britton of the Providence Journal reports.

EDGE Analysis

Kelly stands a realistic shot at being a key bullpen piece as manager John Farrell seeks to shore up the eighth-inning bridge to closer Craig KImbrel. The right-hander has been dominant since returning to Triple-A Pawtucket in early August. He's allowed one run on six hits in 11 innings, walking one and striking out 16.