Mattingly, who wasn't around to see his team's 3-2 loss in 12 innings, was making a pitching change in the tied game, bringing in new reliever Randy Choate for Josh Lindblom, when he yelled something from the mound to Kellogg behind the plate.
Kellogg came to the mound, he and Mattingly exchanged words and Kellogg then tossed Mattingly, his fifth ejection this season. Mattingly then continued his argument with first-base umpire Marty Foster before leaving.
"I just got frustrated. The strike zone was horrible, going down to the last batter," Mattingly said. "[Rafael] Furcal does a check swing and the ball is right down the middle and it's a ball. I guess I showed him [Kellogg] up for turning around [while on the mound]. Maybe it was too hot for him. Maybe they should go to lighter equipment."
Bench coach Trey Hillman took over for Mattingly.