Seattle Seahawks running back Marshawn Lynch may be out up to 4-5 weeks, according to reports, one of which says he will have sports hernia surgery.

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Seattle Seahawks running back Marshawn Lynch had successful sports hernia surgery Wednesday and will be out about a month, according to a report from the the NFL Network, the league’s official network.

The Seahawks have had no comment on the varying reports concerning Lynch. Coach Pete Carroll is expected to address it during his regular Wednesday press conference.

Lynch flew on Monday to Philadelphia for the meeting with Dr. William C. Meyers, a noted sports hernia specialist who also performed a recent surgery on Robinson Cano of the Seattle Mariners. Lynch met with Meyers on Tuesday and surgery was then planned and held this morning.

The Seahawks have six games remaining, beginning Sunday against the Pittsburgh Steelers at CenturyLink Field. If Lynch comes back in late December that might mean he would be available for the last two — Dec. 27 at home against St. Louis and Jan. 3 at Arizona — as well as any post-season games.

Lynch has been battling an abdomen injury suffered in practice a week ago Thursday. Lynch played with the injury against Arizona on Nov. 15 but was a late scratch for Sunday’s win over the 49ers.

Carroll on Monday had surgery might be an option but that the meeting was mostly to evaluate Lynch and see where he is.

“That’s a possibility,” Carroll said of surgery. “But that’s not (the reason for the visit) – it’s to go back there for the evaluation to find out what’s next, and there are a couple choices possibly depending on what the doctor feels is necessary. Then we’ll just wait and see what that all means.”

Carroll said then it was almost certain that Lynch will miss Sunday’s game against the Pittsburgh Steelers at CenturyLink Field.

“I don’t know about that now,’’ Carroll said when asked if Lynch might be able to play Sunday. “It’s legitimately bothering him. He would’ve played (Sunday against the 49ers) if he could have. So I don’t know that. Maybe, that’s why they treat you. They’re going to treat him back there. Maybe the doc’s got something I don’t know that they can help him with.”

Lynch was ruled inactive for Sunday’s 29-13 win over the 49ers after being listed as questionable on Friday. The had anticipated him playing but he wasunable to after going through pre-game warmups and the decision then made to have him visit Meyers.

Lynch was replaced by rookie Thomas Rawls, who set a Seattle rookie record with 209 yards, the second-most in team history and obviously Rawls will continue as the starter in Lynch’s absence.

Seattle on Tuesday re-signed veteran Bryce Brown to add depth with Lynch expected out for at least a week.

Lynch will have to be kept on the 53-man roster while he recovers if the team hopes for him to play at any point the rest of the season.

Lynch had missed just one game as a Seahawk before this season, that coming in 2011 when back spasms held him out against Cleveland. He missed two games earlier this season with a hamstring injury and missed a third on Sunday.

Rawls has started four games this season (including against Chicago when Lynch had issues with a calf early) and has rushed for 100 or more yards in three of those. He has 604 yards on 101 carries, leading the NFL with a 6.0 yards per carry average. He is 14th in rushing overall.