Duffy's plan Thursday was simply to execute his breaking pitches.
"Yeah, I think just my breaking-ball command and slider is what I wanted to work on," he said. "Pretty pleased with my slider. Bounced a couple of curveballs but my fastball got me back in the count the whole way."
Orlando, likely in a battle for the fifth and final outfield spot with Michael Saunders and Tyler Collins, continued his hot spring with two hits and a hit by pitch. Orlando now is hitting .474.
Saunders, who is 6-for-14 this spring, had a two-run single.
Infielder Adalberto Mondesi continues to sit out with a sore arm. He could be back this weekend.
Center fielder Bubba Starling remains out with oblique soreness. He also could be back this weekend.
The Royals play split-squad games Friday. Right-hander Ian Kennedy will take the mound at Surprise Stadium against the D-backs in a 2:05 p.m. CT start. Right-handers Wily Peralta, Brad Keller and Kevin McCarthy also are expected to throw.
In the other split-squad game, right-hander Scott Barlow will start against the Dodgers in Glendale at 2:05 p.m. CT. That will be an MLB.TV game. Right-hander Kyle Zimmer also is expected to make his Cactus League debut.