Montero, 22, raised his Cactus League batting average to .444 (4-for-9) in three games and looked fine behind the plate in his second game catching this spring.
The club's top-rated prospect -- obtained in the Michael Pineda trade with the Yankees -- ripped a long drive off the top of the right-field wall in the sixth inning but was held to a single. He also reached base on an infield single up the middle in the second inning and flied out to right in the third, continuing to hit the ball extensively to the opposite field as he has all spring.
"He's strong," Mariners manager Eric Wedge said. "He can go that way as good as any young hitter that I've seen in a while. He can go that way with power. And that's what you're seeing."
Wedge had said Tuesday he thought Montero had suffered a case of food poisoning, but Montero said Wednesday it was simply a flu bug and he was back to feeling normal.