Wells will start Tuesday's game against the Royals, Roch Kubatko of MASNSports.com reports.
Wells hasn't made an appearance since he was recalled from Triple-A Norfolk on Wednesday, but he'll make his fourth big-league start of the season Tuesday. The southpaw has recorded a 7.71 ERA and 1.93 WHIP in 18.2 innings across six appearances (three starts) for the Orioles this season.