Tua Tagovailoa just gave Dolphins every reason to draft his replacement

Miami Dolphins QB Tua Tagovailoa | Justin K. Aller/GettyImagesIf the Miami Dolphins are going to turn around the franchise and deliver Stephen Ross a winning team, they are going to need another quarterback. The only thing Tua Tagovailoa proved on Monday in the team's Week 15 loss to the Pittsburgh Steelers is that he isn't that person.

The Dolphins' chances of making the playoffs were brutally slim, but that should have taken the pressure off the quarterback. Instead, Tagovailoa delivered another ho-ho-hum primetime game that ended any chances of a miracle.

Tagovailoa threw his first interception on the second drive of the game. It was enough to give him the NFL lead in that category, not…