... he will be suspended for one game. I'm assuming this is the relevant rule.
When an assistant coach, a player (other than a pitcher) or team personnel, other than the head coach, is ejected for disputing an umpire’s decision or for unsportsmanlike conduct or language directed at an opponent or an umpire (including a post-participation ejection), he will receive a one-game suspension in addition to the present game ejection
When an assistant coach, a player (other than a pitcher) or team personnel, other than the head coach, is ejected for disputing an umpire’s decision or for unsportsmanlike conduct or language directed at an opponent or an umpire (including a post-participation ejection), he will receive a one-game suspension in addition to the present game ejection