Rivera, 30, is a career .284 hitter with 72 homers in eight seasons with the New York Yankees, Montreal Expos and the Angels. He hit .246 with 12 homers in 256 at-bats for the Angels last season.
With Rivera back in the fold and the team still pursuing Mark Teixeira, a source with knowledge of the Angels' thinking said it's a "stretch" to envision the team being interested in free agent Manny Ramirez.
All 12 of Rivera's homers came in a span of 58 games after July 2. He also was the Angels' top pinch hitter with five hits in 14 at-bats and five RBIs, including two game-winners.
Jerry Crasnick is a senior baseball writer for ESPN.com. The Associated Press contributed to this story.