Fontana was claimed off waivers by the Angels on Tuesday.
Fontana struggled mightily at the Triple-A level, holding a batting average below the dreaded Mendoza Line and striking out in more than one-quarter of his at-bats, which led the Astros to expose him to waivers. That being said, the 25-year-old does possess some defensive utility across the infield and has a knack for drawing walks, but these positives likely limit his upside to that of a reserve at the major league level even if his batting average improves.