Again, the ref apparently has discretion over that call. It seems in boxing that the ref is very rarely second guessed to the point of overturning their decisions. Perhaps that is partly why we don't have instant replay in boxing?

I do remember on FNF that a NC was changed to a TKO for Delvin Rodriguez, when (I believe) Teddy Atlas implored the NYSAC to look at the replays. They showed that the ref's original ruling of a head butt was erroneous, and that Keenan Collins' cut was caused by a punch. It didn't happen on the spot, but rather was later reviewed.