"It was a combination of things," Maddon said. "Really, it's gone against us a lot early on this year, and I just had enough. I just had enough. I talked about it the other day. It's probably the most ill-defined rule or ruling that the umpires have to deal with. It's not easy. I know it's not easy. But it seems to have been something that's gone against us more recently, and it's really been a critical part of some games, and I just had enough of that."
Eaton, who led off the inning, wound up grounding out to Rays reliever Brandon Gomes, who retired the side in order.
It was Maddon's first ejection of the season. The Rays won, 4-0.
Tony Meale is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.