Sanchez tossed two interceptions on just 18 attempts with the Cowboys last season, appearing in just three games as Dak Prescott's backup. The eighth-year veteran has started 72 career games, posting a 56.7 completion rate, 86:86 TD-to-INT ratio and 73.9 passer rating. He's among the most turnover-prone quarterbacks of his era.
Glennon is due to earn $16 million this season, suggesting he's locked in as John Fox's Week 1 quarterback. That said, he's an inconsistent passer and an unproven commodity as the starter.