Complex sentence: The 16-point deficit was the largest deficit to be erased in a Super Bowl and the first greater than 10 points, but the Titans only tied the game and never gained the lead.
Split into simpler sentences: The 16-point deficit was the largest deficit to be erased in a Super Bowl and the first greater than 10 points. Also, however, the Titans only tied the game and hadn't yet gained the lead.