Robert Griffin III will start for Redskins on Sunday, according to his father

Two days after spraining his knee, Robert Griffin III is "doing great," according to his father. (Patrick McDermott/Getty Images)

The father of Washington Redskins quarterback Robert Griffin III told USA Today that his son will start on Sunday against the Browns despite a sprained right knee.

Griffin injured the knee in the fourth quarter of this past Sunday's overtime win over the Ravens, which brought Washington's record to 7-6, one game behind both the NFC East-leading Giants and the wild card leaders.

The team has diagnosed the injury as a Grade 1, mild sprain, but coach Mike Shanahan has yet to reveal publicly whether Griffin or rookie backup Kirk Cousins will start on Sunday.

But Robert Griffin II says his son has already informed him that his condition has improved enough for him to be ready.

"He's doing great,'' Robert Griffin II told USA TODAY Sports. "He definitely said he plans to start. I haven't seen him (the last two days). But he told me (today) everything has gone well.''

...

After some mild swelling, the knee has responded.

"He's doing rehabilitation as far as the impact pain working with that,'' Griffin's dad said. "Monday he said he felt really good. Today he felt better. Every day he's getting better. Monday he had no problems and throughout the workout, he had no problems.''