The Red Sox plan to call up Kelly from Triple-A Worcester on Wednesday, Chris Cotillo of The Springfield Republican reports.
Boston optioned Kelly to the minors May 26, but he'll be eligible to rejoin the team in fewer than the minimum 15 days with Chris Martin (undisclosed) set to be placed on the 15-day injured list in a corresponding move. In 16.2 innings of relief with Boston, Kelly owns a 2.16 ERA and a 1.26 WHIP.