Bello (0-1) took the loss versus the Rays on Wednesday, allowing four runs on six hits while striking out two and walking three across four innings.
Bello allowed four earned runs in his debut and began his MLB career with a loss. He threw 45 of 79 pitches for strikes across and allowed four runs thanks to a single and two doubles. If the Red Sox decide to give him another turn in the rotation, he tentatively lines up to face the Rays again next week.