By Jimmy Traina How will they handle Tua Tagovailoa’s return from concussion? 1. There probably hasn’t been a more controversial story in the NFL this season than the handling of Tua Tagovailoa’s head injuries. The Dolphins’ QB was unable to stand on his own after taking a hit during a Week 3 game against the Bills. But Tagovailoa somehow cleared concussion protocol, the Dolphins declared he had a back and ankle injury, and he was allowed back in the game. Four days later on Thursday Night Football, Tua was slammed into the turf by Cincinnati’s Josh Tupou on a sack and had to be carted off the…