brushback pitch
US /ˈbrʌʃbæk pɪtʃ/
UK /ˈbrʌʃbæk pɪtʃ/

1.
a baseball pitch thrown intentionally close to a batter's body, usually as a warning or to intimidate them
:
•
The pitcher threw a brushback pitch to keep the batter from crowding the plate.
•
It was a clear brushback pitch, sending a message to the opposing team.