Updated

Washington Redskins quarterback Robert Griffin III will reportedly start the team's season opener on Sept. 9 against Philadelphia.

While Griffin has yet to be officially cleared to play as he continues to recover from knee surgery in January, NFL.com and ESPN have both cited sources as saying last year's top offensive rookie will get the starting nod in Week 1.

Griffin was cleared to practice earlier this summer, but has not appeared in any of the Redskins' preseason games. He won't play in Thursday's exhibition finale against Tampa Bay, but is expected to be examined by Dr. James Andrews and should receive final clearance at that time to start the regular season.

The Washington Post reported Tuesday that Griffin has taken nearly all the first-team offensive snaps in practice.

Griffin underwent surgery in January to repair both the lateral collateral and anterior cruciate ligaments in his right knee. He suffered the LCL injury in a Week 14 win over Baltimore and missed one game, then was hurt again during Washington's wild card playoff loss to Seattle.

The former Heisman Trophy winner and second overall pick of the 2012 draft was named the NFL's top offensive rookie last year when he led the Redskins to the NFC East title. He completed 65.6 percent of his passes for 3,200 yards with 20 touchdowns and five interceptions in 15 games while also rushing for 815 yards and seven scores.