Carp exited Sunday's game in Anaheim after he felt something pop in his right hip as he stretched to receive a throw at first and was not in Monday's lineup while the team waited for his MRI results. Wedge did not specify the injury, but said, "he does have something going on."
"With Carp, it's more about the position he plays, because he can feel good in a couple days and he goes out there in three or four days and stretches again, which you're going to have to do, and then we re-injure it," Wedge said. "That's not what we want to do, so we want to try to nip this in the bud."
Wedge said there has not yet been a decision on who the Mariners would recall to take Carp's spot on the 25-man roster, should he go on the DL.
Second baseman Dustin Ackley made his seventh start of the season at first base on Monday. Regular third baseman Kyle Seager moved to second and utility man Chone Figgins manned the hot corner for Monday's game against the Rays.
Carp, who has had two separate stints on the disabled list this season for a right shoulder injury, is the only first baseman on the current roster after Justin Smoak was optioned to Triple-A Tacoma on July 23. Smoak entered Monday hitting .222 in 19 games with Tacoma and Wedge said "there's a chance" he could rejoin the big league club.
"He's making some progress, he's just working on his swing," Wedge said. "He obviously played a great first base for us up here, so he's just down there to work on his swing, shorten up to the baseball a little bit, be a little more consistent with his swing in games.
"Like I said, we've seen it a lot in BP, but it's just been inconsistent in games. He's moving in the right direction. No timetable. Just being more consistent. When he's best, he's nice and loose and goes right to the baseball. That's what we want him to do."
Another possibility at first would be Jesus Montero. The 22-year-old rookie catcher has never made a Major League appearance at first, but has been working at the position throughout the year. Wedge didn't rule out the possibility of seeing Montero in the field this year, but did say he didn't think he was ready.
One catcher that Wedge all but ruled out of the first base conversation is John Jaso, who also has been taking ground balls at first.
"He's over there if we absolutely need him," Wedge said, "But I don't see that happening right now."