Bubic, 24, got off to a disastrous start this season with a 12.83 ERA over five starts and one relief appearance totaling 13 1/3 innings. He fared little better over three starts in Triple-A, surrendering 10 earned runs in 13 2/3 innings. His peripheral numbers did improve, however, with a 4-to-17 walk-to-strikeout ratio after posting a 11-to-10 such mark in the bigs.
Bolanos, 25, has made eight appearances out of the bullpen this year while serving as a bulk reliever. He has a 4.42 ERA/5.71 FIP over 18 1/3 innings of work with 12 strikeouts and 12 walks in that time. Bolanos has primarily served as a starter while in the minors.