Updated

The Washington Redskins received some very encouraging news regarding the availability of quarterback Robert Griffin III for their upcoming game against the Cleveland Browns, as the rookie sensation was back practicing on Wednesday just three days after injuring his knee in this past weekend's win over Baltimore.

Griffin, who suffered a Grade I sprain of the lateral collateral ligament in his right knee during the fourth quarter of Sunday's 31-28 overtime triumph over the Ravens, participated in non-contact drills during Wednesday's session and told reporters afterward his health is steadily improving.

"It's gotten better every day, which is a positive sign for me," Griffin said. "Sunday night, I thought there probably was no chance that I could play the next week. Then Monday morning, I felt better about it. Yesterday, I felt better about it and today, I feel really good about it."

While the Redskins won't make a determination on Griffin's status for Sunday's matchup with the Browns until later in the week, head coach Mike Shanahan said his young signal-caller would play if cleared to go.

"We will see at the end of the week if he is full speed, ready to go," Shanahan remarked. "If he is, he will play."

Fellow rookie Kirk Cousins saw increased reps in Wednesday's practice and would draw his first career start in the event Griffin is held out. The 2012 fourth-round pick took over for a hobbled Griffin against the Ravens and threw a touchdown pass to Pierre Garcon with 29 seconds left in regulation to bring the Redskins within 28-26, then ran in the subsequent conversion attempt to force overtime.

Griffin has started every game this season for Washington, which has vaulted back into playoff contention in the NFC by ripping off four consecutive victories, and is presently tied with New England's Tom Brady for the NFL lead with a 104.2 passer rating. The 22-year-old also tops all quarterbacks with 748 rushing yards and has thrown for 18 touchdowns with just four interceptions while completing 66.4 percent of his attempts.

The 2011 Heisman Trophy recipient has been particularly good during the Redskins' current unbeaten run, having amassed 10 touchdown passes and only one interception along with a 68.5 percent completion rate over that stretch.