[greymule]

I think basically we can all agree that from a replay the ball was cleanly caught.

I thought so until I saw the slow motion replay. The ball may well have hit dirt, as it appears to rise slightly into the mitt. The problem is the straight-on angle. Is the ball moving within the glove, or did it enter the space of the glove but catch dirt before hitting leather? The side angle is inconclusive. We'll never know for certain, though I suspect that highly sophisticated photographic analysis could tell.

From the New York Times:

[Catcher Josh] Paul said an umpire usually hollers "no catch" when a ball hits the dirt, but that Eddings said nothing.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Eddings admitted that he pumped his fist, but said that was his mechanism for signaling a swinging third strike. . . . Eddings acknowledged that he did not say "no catch."