The Angels promoted Alvarez from Single-A Rancho Cucamonga to High-A Tri-City on Tuesday.
Alvarez went 1-for-3 with a walk Tuesday in his debut for Tri-City. Regarded as one of the Angels' top lower-level prospects, the 19-year-old earned the bump up to the Northwest League after slashing .296/.396/.479 with 11 home runs and 46 stolen bases in 96 games with Rancho Cucamonga.