Jeff Mathis is more than just a backup catcher for the Marlins. He’s the only catcher in the organization — other than regular starter Rob Brantly — with any major-league experience.

That’s why manager Mike Redmond was downcast Saturday upon learning that Mathis had sustained a broken collarbone in the Marlins’ Grapefruit League opener.

“Obviously a big blow for us,” Redmond said. “Just a freak deal.”

Mathis was injured in the fourth inning when the Cardinals’ Matt Holliday fouled a ball off the catcher’s chest protector. Despite the padding, the ball still hit hard enough to fracture Mathis’ right clavicle.

Redmond said he could be out six weeks.

“It just got me square,” Mathis said. “It hit me in the pad. It’s just one of those things, catches you just right. Been hit there a lot of times. It felt like any other foul tip I’ve taken off the mask, off the shoulder, off the hand.”