Griffin, who is competing with at least four Rangers pitchers for the final rotation spot, began his fourth spring outing with three perfect innings, inducing four ground balls and striking out three.
But the fourth was more complicated. Griffin fanned Travis Snider and Lorenzo Cain, but then yielded back-to-back homers to Royals mainstays Eric Hosmer and Salvador Perez.
Neither shot could be attributed to the quirky, short dimensions in right field.