Derrius Guice, Case Keenum, Reuben Foster pivotal for Redskins

ASHBURN, Va. -- One could block the path of the rookie quarterback, buying the coaches time to get Dwayne Haskins ready. Another could provide the energy the Washington Redskins' offense needs. And the third could help lift the defense into a place it hasn't been in a while.

All three players -- quarterback Case Keenum, running back Derrius Guice and linebacker Reuben Foster -- are among Washington's most important players this season.

There's no doubt the health of the Redskins' offensive line greatly factors into this season, just like it did in a negative way the past two years. But when healthy, the Redskins know what they will get up front.

The Redskins remain excited about the potential…