Moore broke the third metacarpal on his upper hand while blocking a ball in the dirt. He saw a hand specialist Tuesday afternoon and manager Eric Wedge had no update following the Mariners' 10-3 victory over the Cubs in Mesa, but said Moore's sure to miss the rest of Spring Training.
Moore missed almost the entire 2011 season after injuring his right knee in his second regular-season game and undergoing surgery to repair a medial meniscus tear.
"It's tough for the kid," said Wedge. "He's going to have to just keep his chin up and fight through it again. He's had some tough luck the last couple years. I do think we'll get him back sooner than later, hopefully."
Moore was off to a hot start at the plate this spring, going 4-for-6 with a home run, double, three RBIs and four runs scored in three appearances. But he was already in a tough battle to earn a roster spot after the Mariners traded for Jesus Montero and John Jaso over the offseason to work behind starter Miguel Olivo.
"He'd had a couple good days there and hit the ball well," said Wedge. "I felt like he was gradually getting more comfortable catching, because he just didn't play last year. I was more curious just to watch him progress through the course of the spring, just to see how far along he was coming back."
A sixth-round Draft pick in 2006, Moore has been regarded as a top catching prospect and has hit .303 with a .482 slugging percentage in his Minor League career. But he's yet to convert that to success at the Major League level, playing 68 games over three seasons with the Mariners and hitting .197 with five home runs and 17 RBIs.
The Mariners had previously lost starting center fielder Franklin Gutierrez to a partially torn pectoral muscle that will likely sideline him for at least the first few weeks of the regular season as well.