I just watched the play again on replay. This is what I saw:
1. Bunt fielded by Plumlee and thrown to Foscue covering at first. This would be when he noticed the scuff.
2. He sees the out at first, then checks the runners and sees they are holding at 2nd and 3rd after the out at first.
3. He then looks directly at the ump who is standing at the plate and appears to say something, most likely, "Time". This is confirmed by Foscue's mom after the game in a tweet. Foscue is much farther away from Plumlee than is the ump, but hey, Foscue has "young ears". Maybe the ump doesn't hear so well.
4. Plumlee looks back at Foscue so he can get the ball back. He gets the ball back, turns back toward the ump and sees the ump is backing up, behind the box, mask off, both hands hanging down at his side, and in the same motion tosses the ball into the dugout.
5. He points to the ball as it is rolling back, appearing to say something, probably, "That ball is scuffed"
6. He turns back to the ump and holds his glove up expecting to receive a new ball from the ump. At this point ump has yet to make his call and our catcher is right in front of him retrieving the mask he threw off for the bunt. (Why is time not already called to allow for this?) Before ball has even gotten to the dugout, the batgirl is picking up the bat in full view of the ump. Still no time called. (Why again is time still not called? Probably because this ump is deciding he is going to use his power and misuse a rule on a technicality to impact the game/demand the respect he feels he wasn't shown when Plumlee looked for the ball from Foscue rather than waiting for this ump to grant the time he was required to grant)
7. When blue does not give him a new ball Plumlee walks toward our dugout to get a new ball. He is almost all the way to the foul line before the ump walks onto the field, taking a path that intersects with Plumlee...then and only then does he call time and awards the 2 bases. Plumlee turns toward the ump shocked, then has a conversation with the ump (pointing to the plate as he does so), most likely telling the ump he had asked for time and a ball from him earlier when he was at the plate. The ump answers back as he finally hands a ball to Plumlee. He's almost for sure saying either he never heard Plumlee ask for time, or telling Plumlee he had not granted it (Why not? Is he hard of hearing or was he being an *** because he felt, "disrespected" when Plumlee requested it, but didn't wait for an acknowledgment before turning to Foscue to get the ball back?)
8. Lemonis enters the field, pointing to the 3rd base ump, then the home plate ump. Clearly he is responding to home plate ump claiming he never heard the request for time, as he talks to the 3rd base ump, no doubt asking him if he heard it called and could tell his colleague behind the plate. Most likely the 3rd base ump did not hear, which is not surprising, given he was farther away still at his position to monitor the baserunner who had slid into 3rd.
"These are the facts of the case, and they are indisputable." (And yes, the "irony" of Kevin Bacon's character losing the case is not lost on me.)