This off-season LA Angels general manager Billy Eppler made a point to fill the holes in the Angels roster and one of his top priorities was bolstering the Angels bullpen. Eppler traded Jose Alvarez to Philadelphia for hard-throwing Luis Garcia. They also signed Cody Allen to fill the closer role the Angels have been missing the past couple of seasons.
Couple this with the emergence of Justin Anderson in 2018 along with the acquisition of Ty Buttrey from Boston in a trade deadline deal. The Angels also claimed Hansen Robles off the waiver wire mid-season and now the Angels have a very formidable weapon in their bullpen.