With no alternative, no consequence for Antonio Andrews' big mistake

NASHVILLE, Tenn. -- There is a certain safety from being at the top of the depth chart on a bad team.

Screw up, and the pressure from the guy behind you on a thin roster may not be so great.

Antonio Andrews is benefiting from such safety with the Tennessee Titans. He made a huge mistake against the Patriots that left Marcus Mariota with a sprained right knee, out for Week 16 against the Texans and in doubt for the season finale in Indianapolis.

Antonio Andrews had done a good job in pass protection for Marcus Mariota ... until Sunday.On a third-and-7 from the New England 23-yard line, Andrews lined up to the left of Mariota, who was in shotgun. Pre-snap, virtually straight ahead of Andrews was…