Regular-season finales might provide stages for 2008 QB plans

Sunday, Jets QB Chad Pennington (left) and his former head coach Herman Edwards (right) will be on opposite sidelines as Edwards' Chiefs visit. But could the pair, seen above in 2005, be reunited? David Drapkin/Getty Images

This season could rank as the most unstable for quarterbacks since the NFL implemented the 16-game schedule in 1978.

Teams have used 61 different starters, and that number is set to rise in Week 17.