Thanks for the input and pics! He definitely looks unique to me and I wish I would have gotten some better pics of him. As far as it being an old injury is definitely possible I just didn't see any weird damage on him. He ended up spawning with a normal one and I found where they were hiding them so I scooped about a dozen fry up I figured if there is a chance it's genetic I would regret not getting them lol. And so far they seem to be doing good just tiny.
Check out the one upper left, this is a pond near Everglades City
Mayans vary greatly from Cenote to Cenote in the Yucatan, where they are endemic, some have bands, some don't, as in the video below. Some (like the ones found in salt water off Isla Mujeres are very red.
Something similar happened w/ my robertsoni. It lasted a few weeks and it was the only time in 7 years! Not sure why only the rear section. At first I thought breeding colors, but she laid eggs before and never turned black like this.