Baseball, by the Rules

Home plate umpire Alex Tosi signals a called strike from pitcher Brenan Hanifee, of the Detroit Tigers, to batter Zach Neto, of the Los Angeles Angels.
A Strike is Added to the Count
When a pitch results in a strike, be that a called strike, swinging strike, foul ball, or automatic strike, what happens next depends on how many strikes there were to begin with.