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The Barnsley boss claimed that the 'multi-ball system had stopped as soon as the Blades netted their opening goal. And despite Davey being adamant that the system completely stopped, Blackwell played down the quotes.
After the game, Davey said: "It was nothing really. I was disappointed with the multi-ball system. That was the issue.
"When Sheffield United scored their first goal all the balls disappeared. We had 24 when we were drawing and then there's one ball in the stadium when we're losing the game.
"I spoke to the referee and there were words exchanged, but it's nothing."
Blackwell also commented about the multi-ball system allegedly stopping. He said: "I don't control the multi-ball system and it never went missing. I don't know what he's on about."
The two managers confessed that they made up after the game and everything was forgotten about, but the FA are to take it further after referee Grant Hegley included the spat in his report.