Pearson (groin) will be recalled from Triple-A Buffalo on Wednesday, Ken Rosenthal of The Athletic reports.
The 25-year-old was activated from the minor-league injured list in mid-August after recovering from the groin injury, and he gave up two runs on three hits with a 5:2 K:BB in five innings over five outings for Triple-A Buffalo. Pearson and Bryan Baker will be promoted from Buffalo to fill the two roster spots opening up with Wednesday's roster expansion. Pearson started in his lone appearance in the majors this year back in May, but he'll now operate as a bullpen piece.