Even though the Angels are stinking it up right now, they did have the biggest play in baseball yesterday according to Baseball Reference Newsletter:
Yesterday's Biggest Play
Batter: Zach Neto (LAA)
Pitcher: J.T. Ginn (ATH)
Situation: Bottom 9th, 0 out, 2-0 count, Runner On 1st
Score: ATH 1, LAA 0
Home Run (Fly Ball to Deep CF)
2 runs scored on the play, and LAA went from a 33% win probability to a 2-1 walk-off win.