Garcia was not going to make the team, he has great stuff but below par command, and I think they've run out of patience.
Though Alvarez doesn't fit the LOOGY profile (splits are pretty even, less contact but more HRs against LH), he is better suited to the back of the pen role, he won't come in and walk the first two batters on a regular basis!
It's a no lose deal for Klentak, Garcia is well behind Arano and Ramos, and probably even with Rios, who is likely to start the season in Lehigh if he has options left, and if not, will probably clear waivers.At this point, not a sure thing Garcia beats out Leftwich and McGarry, much less Anderson and De Los Santos in a bullpen role.