Kelly will serve as the Red Sox's opening pitcher for Monday's game against the Blue Jays, Mac Cerullo of the Boston Herald reports.
Over his 48 appearances between Boston and Triple-A Worcester this season, Kelly hasn't covered more than three innings on any occasion, and he hasn't recorded more than three outs in any outing since July 22. As such, Kelly shouldn't be expected to work more than once through the batting order before exiting the contest. Cooper Criswell is available on four days' rest and Brad Keller is available on two days' rest as potential bulk-relief options behind Kelly.