Montero, traded by the Yankees this winter in the Michael Pineda deal, followed Luis Rodriguez's leadoff shot against A's veteran Grant Balfour in the fifth with a two-run drive to center, putting the Mariners ahead, 7-1. The Seattle catcher, who caught only 22 innings in the Majors last year with New York, was removed for precautionary reasons in the bottom of the inning after taking a hard foul tip to the mask off the bat of Josh Donaldson.
"He's OK," Mariners manager Wedge, a former catcher, told MLB.com. "He got hit in the jaw a couple times. I don't know if I've ever seen it happen two times in a row like that. The first one got him pretty good, but obviously, the second one was right on top of that, so we got him out of there. But he should be fine.
"I've been back there. You get hit like that. It's just unusual to have it happen two times in a row."
The 22-year-old Venezuelan enters the season ranked No. 12 on MLB.com's Top 100 Prospects list after making his Major League debut last season with the Yankees primarily as a designated hitter. He hit .288 with 18 homers and 67 RBIs at Triple-A Scranton/Wilkes-Barre last year before appearing in 18 regular-season games with the Yankees.
Montero popped up to center field in his first at-bat before reaching on second baseman Jemile Weeks' error in the fourth. Montero was charged with an error himself when he dropped a pop-up in the second inning and was charged with a passed ball shortly before the foul tip that led to his removal.
Seattle held on for an 8-5 win in Phoenix, marking the first Cactus League game of 2012. A's designated hitter Manny Ramirez made his return to baseball, going hitless in two at-bats. The former All-Star slugger is expected to make a 10-game Minor League rehab stint in May before he's eligible to return from his 50-game suspension.
Vinnie Catricala, the Mariners' top third base and outfield prospect, went 0-for-3 in the win. Seattle hit five homers on the afternoon.