Wells was called up from Triple-A Norfolk on Friday.
The 24-year-old has a 5.63 ERA, 1.34 WHIP and 27:4 K:BB across 32 innings at Triple-A this season, and he'll receive his first taste of the big leagues. Wells and Konner Wade, who had his contract selected Friday, could be in the mix to fill the rotation spot of Dean Kremer after Kremer was demoted to Norfolk.