Geltz's pitch came after Rays third baseman Evan Longoria left the game after being hit by a pitch in the top half of the inning.
At Cash's urging, the call was reviewed and confirmed. The ruling did not sit well with the rookie manager, who charged the field and was immediately ejected by home-plate umpire Laz Diaz.
"At the time I did not [think Donaldson got hit]," Cash said. "It was probably frustrations over just the entire replay system. I'm confused by it all. It's an awkward situation because Laz and [third-base umpire] Jeff Nelson do a great job. It's not on them. So it makes it awkward.
"I know I'm ejected if I come out there. But from what I saw on the Jumbotron, which was 400 feet away -- which probably doesn't make the most sense -- but I just had enough."
The ejection was Cash's second of his career. As a player he was ejected by Mike DiMuro on Sept. 7, 2007, while playing for the Red Sox.