Bello will start Monday's game against the Rays, Bill Koch of The Providence Journal reports.
Bello made his major-league debut Wednesday against Tampa Bay and allowed four runs on six hits and three walks while striking out three in four innings. Despite his lackluster results, he'll get at least one more turn through the rotation for Monday's series opener at Tropicana Field. The right-hander has been dominant in the minors this year, posting a 2.33 ERA, 114:33 K:BB and 1.02 WHIP in 85 innings between the Double-A and Triple-A clubs.