Harris said Tuesday he hurt the patella tendon and hoped to have surgery soon as he heads to injured-reserve status. He hurt the same knee during the off-season.
"It is what it is, you know? It's something I've got to go through and must be done," Harris said.
More running backs out
The Cleveland Browns placed running back Montario Hardesty on injured reserve with a knee injury, ending his season. Hardesty, whose NFL career has been slowed by injuries, underwent knee surgery earlier this month. Hardesty is the second Cleveland back to go on IR, joining Dion Lewis, who was placed there Monday with a surgically repaired left leg.
Carolina Panthers running back Jonathan Stewart will miss at least the first six weeks of the season while he recovers from an ankle injury. Coach Ron Rivera said after practice Tuesday that Stewart was placed on the physically-unable-to-perform (PUP) list.
Washington quarterback Robert Griffin III could be cleared to play in the regular season when he meets with his surgeon Thursday night.
"I know Dr. Andrews will sit down and evaluate Robert and probably just give us his recommendation," Shanahan said.
Even if Andrews gives the thumbs-up, the final decision on whether Griffin plays in the Sept. 9 opener rests with the coach. Shanahan has said that even if Griffin is medically ready, the coach could see something in practice that might give him pause.
Dallas Cowboys defensive tackle Jay Ratliff will miss at least the first six games of the season after he was placed on the PUP list with hamstring and groin injuries. ... Baltimore Ravens linebacker Jameel McClain will miss at least the first six weeks of the regular season as he recovers from a bruised spinal cord. ... The Seahawks made official Tuesday what already was a foregone conclusion: Wide receiver Percy Harvin will be on the sidelines for at least the first six weeks of the season. ... With Blaine Gabbert sidelined because of a broken thumb, the Jacksonville Jaguars picked up quarterback Ricky Stanzi on waivers. Stanzi spent two seasons on Kansas City's active roster but did not play in a regular-season game.
New York Jets running back Mike Goodson was suspended by the NFL for the first four games of the season for violating the league's substance abuse policy. Goodson, signed as a free agent in the off-season, rejoined the team Monday after being away all of training camp for personal reasons that the Jets declined to detail. The Jets also signed kicker Dan Carpenter to compete with incumbent Nick Folk, and released Billy Cundiff. ... The NFL Players Assn. has filed a grievance to help former New England Patriots tight end Aaron Hernandez collect an $82,000 workout bonus. The union says it has a responsibility to protect the rights in the collective bargaining agreement for all players. The Patriots cut Hernandez after he was arrested June 26 and before he was charged with murder later that day.