Boyle opened Sunday's 10-1 loss to the Padres with three scoreless innings, allowing one hit and two walks while striking out four.
Boyle impressed in his MLB debut, allowing just a first-inning single to Juan Soto and two free passes while spotting 35 of his 58 pitches for strikes. The right-hander sported a four-pitch arsenal Sunday and notably maxed out at 99.7 miles per hour with his fastball. The Athletics haven't outlined their plans for Boyle moving forward, but he'll most likely work as an opener or a traditional starter the next time his turn in the rotation comes up this weekend versus the Tigers.