Browns starting right guard Shawn Lauvao is expected to be out about six weeks after undergoing arthroscopic ankle surgery Friday meaning he could miss the first two to three weeks of the season a league source said.

Lauvao the Browns' third-round pick in 2010 had a piece of loose cartilage removed the ankle and also suffered a high ankle sprain. Jason Pinkston working his way back after being out of football for seven months following a blood clot in his lung is expected to start in Lauvao's place.

"He'll miss some time early in the season but I don’t have any definitive dates and times on that'' head coach Rob Chudzinski said on a conference call. "We'll just have to see how that goes from the results of the scope and how he’ll progress over the next few weeks.''

Lauvao who's started the past two seasons was injured Monday in practice during a one-on-one blocking drills with massive nose tackle Phil Taylor. Taylor got underneath Lauvao's pads and Lauvao buckled. He knelt winced and grabbed the ankle. He was then carted into the fieldhouse and hasn't been seen at practice since.

Pinkston who missed the final 10 games of last season after leaving the Cincinnati game Oct. 14 with what proved to be the life-threatening blood clot started Thursday night against the Rams and played into the second quarter.

"I was pleased with Jason’s performance'' said Chudzinski. "He did well along with the group of ones upfront. Then he continued and played little bit more. We wanted to get him more work and keep working him back into things and he did a good job. I was pleased with him.''

Heading into the game Pinkston admitted that not only is he still getting his football legs back but that moving to the right side has been an adjustment. Before the bloodclot he started 22 straight games at left guard and was replaced by John Greco who has taken over the position.