Mattingly was also given an undisclosed fine “for excessive arguing” with home plate umpire Angel Campos in Thursday’s 10-6 loss in Pittsburgh. Mattingly and outfielder Matt Kemp were ejected in the game.
The suspension was announced Saturday by Joe Garagiola Jr., senior vice president of standards and on-field operations for MLB.
Kemp received no suspension or fine.
“I’m happy about that,” Mattingly said.