Fontana was recalled from Triple-A Salt Lake on Monday.
He'll replace C.J. Cron on the active roster, giving the Angels some more versatility around the infield. Fontana has carried a .374 on-base percentage over 166 plate appearances with Salt Lake this season, but it's uncertain that he'll receive an opportunity to put his offensive skills on display during his stint with the Angels. He may just be asked to play a depth role at multiple infield spots.