The Angels selected Campero's contract from Triple-A Salt Lake on Sunday.
Campero has spent most of the season at Double-A Rocket City, where he posted an .888 OPS with 14 home runs and 29 steals in 93 games before earning a promotion to Salt Lake in August. The 26-year-old isn't likely to have a regular role with Anaheim, but he could still see some opportunities during the final two weeks of the regular season. He caught 34 games in the minors in 2023, but he's played exclusively in the corner outfield or at designated hitter in 2024.