Diplan was outrighted to Triple-A Norfolk by the Orioles on Wednesday, Roch Kubatko of MASNSports.com reports.
Diplan made his major-league debut in 2021 and posted a 4.50 ERA, 1.23 WHIP and 24:15 K:BB over 30 innings. He's off the 40-man roster but could be with the team for big-league camp during spring training.