But manager Mike Scioscia indicated Monday morning that nothing is set in stone, saying: "I don't think anything's been decided yet, but he's struggling with some things right now."
A speedy left-handed hitter who can handle all three outfield spots, Moore saw action in eight games with the Angels as a rookie last year and has produced a .277/.329/.473 slash line in seven seasons in the Minors. Moore was cleared to begin his running program early in camp, but hasn't been able to work himself into games and is leaning toward getting the procedure out of the way as soon as possible.
Moore says he wouldn't require hip-replacement surgery, but needs to take care of a bone spur, among other things.
"After talking with the staff and the doctors, we're definitely leaning towards it," said Moore, originally a sixth-round Draft pick by the Angels in 2005. "It sounds like the best thing to do at this point, for the long-term. ... What the doctors will tell you is that it's probably not going to get any better, due to what I have going on. We're just trying to get to a comfortable point where maybe I can handle it, but it just hasn't been coming along as quickly as we want it to."
Moore, 24, has been dealing with pain in his hip for the last couple of years, a problem doctors believe was caused through the rigors of being a four-sport high-school athlete in Louisiana.
The Angels have their outfield set, and also have Bobby Abreu as a reserve, so Moore would've begun the season once again at Triple-A Salt Lake, where he played 113 games last year.
"It's definitely disappointing," Moore said. "You come here every day and you put the work in, and you can't get over that final hump to get to where you need to be, it's definitely disappointing, especially this year. Feeding off the energy of the clubhouse -- and you have to sit here and not be a part of it -- is the most disappointing thing I've ever faced in my career."
Alden Gonzalez is a reporter for MLB.com. Read his columns and his blog, Gonzo and "The Show", and follow him on Twitter @Alden_Gonzalez. This story was not subject to the approval of Major League Baseball or its clubs.