"I was definitely a little surprised," Masset said. "I wasn't really aware of what was going to happen. Coming in, I felt like there was going to be a fine. It was my first time being ejected, especially for this type of situation. I don't necessarily agree with the discipline, actually, but I'm just going to take it and do my due diligence."
According to MLB's announcement, Masset was suspended because his pitch came after each team was issued a warning after the Braves' David Carpenter hit Corey Dickerson with a pitch in the eighth, after Dickerson's backswing caught Braves catcher Gerald Laird on his mask and forced him to leave the game.
Carpenter also received an undisclosed fine.
Masset retired the first two batters of the ninth inning before hitting Gattis and earning the ejection. He did not address whether it was his duty to stand up for his teammates, who gave him high-fives in the dugout as he left the field.
"That was kind of the way the game went," Masset said. "I don't have a whole lot of comment on it. We've already moved on.
"People want to talk about the high-fives and that, coming in the dugout. They were high-fiving me because I got two outs and we were winning the ballgame. I don't think it had anything to do with, 'Way to hit him,' or something like that. We played a great game that day."
Thomas Harding is a reporter for MLB.com. Follow him on Twitter @harding_at_mlb. This story was not subject to the approval of Major League Baseball or its clubs.