This is a bigger deal that it appears. Between 2013 and 2017, the LA Angels had exactly one single, solitary prospect — Sean Newcomb in 2014-15 (later moved in a totally worth-it trade for Andrelton Simmons) — appear on any of MLB’s top 100 lists.
Much has already been written about the athleticism of Adell, still just 19 years old, jumping from A Ball to A+ before finishing the year at AA Mobile. Already heralded as the Mike Trout Insurance Policy, Adell may have a more immediate spot on the Angels if he continues to grow apace: he was a high school pitch and possesses a cannon arm, which would allow him to play right field should Kole Calhoun continue to hit at an unplayable low-level.