The complete 25-man roster: Pitchers (10) -- John Lackey, Jered Weaver, Scott Kazmir, Joe Saunders, Ervin Santana, Matt Palmer, Darren Oliver, Bulger, Kevin Jepsen and Brian Fuentes; catchers (3) -- Mathis, Napoli and Wilson; infielders (6) -- Kendry Morales, Howard Kendrick, Maicer Izturis, Erick Aybar, Chone Figgins and Robb Quinlan; outfielders (5) -- Juan Rivera, Torii Hunter, Bobby Abreu, Gary Matthews Jr., Reggie Willits; designated hitter (1) -- Vladimir Guerrero.
Guerrero can play the outfield in an emergency but hasn't been in the field since injuring his right knee in July. Quinlan is an infielder/outfielder, capable of playing all four corner positions.
The presence of Wilson, who has impressed Scioscia defensively, gives the manager an option to hold Napoli back as a pinch-hitter and bat for Mathis in late-game situations if the need arises. It also affords Scioscia the luxury of bunting for Napoli, if he deems it necessary, late in a game.
Willits made the roster as a versatile late-inning weapon, joining Matthews as outfield reserves. The bench will include Izturis for Game 1 with Kendrick playing second base against southpaw Jon Lester. Napoli also will be on the bench with Mathis catching Lackey.
Izturis will play second base against Boston's right-handed starters, with Kendrick going to the bench with his hot bat.
Wilson, who spent almost the entire season at Triple-A Salt Lake, has familiarity and experience -- through Spring Training and three trips to Anaheim this season -- with all of the Angels pitchers except Kazmir, who was acquired on Aug. 28 in a deal with Tampa Bay.
"It gives us some depth, some versatility," Scioscia said of the decision to carry three catchers. "Carrying a third catcher made a lot of sense.
"If it's a place where you need to get a bunt down and Nap's in the game or a better [hitting] matchup if Jeff's in the game, having the third catcher helps."
Willits, Scioscia said, brings multiple skills.
"We can plug him in some situations late, whether as a pinch-runner, to bunt, lead off an inning, play defense. He brings a lot there."
Santana's ability to pitch multiple innings as he moves to the bullpen made an 11th pitcher unnecessary, in Scioscia's view.
Weaver, the Angels' Game 2 starter against Josh Beckett, was in the bullpen last October, and he delivered two scoreless innings in the Angels' lone victory in Game 3 in Boston.
Kazmir will pitch Game 3 in Boston, with Saunders poised for Game 4, if necessary. Both lefties have excelled at Fenway Park.