If Griffin has torn the ACL again, he likely would require a rehabilitation period of 9 to 12 months, putting his status for next season in jeopardy.
Griffin reinjured his knee twice in Sunday's playoff loss to Seattle.
The Washington Post reported that Griffin might have suffered partial tears to the ACL and the lateral collateral ligament in his right knee.
Griffin, who entered Sunday's game already nursing a previously sprained LCL in the same knee, appeared to tweak the knee on a pass in the first quarter and then left the game in the fourth quarter after twisting his leg while attempting to recover a muffed shotgun snap.
In the same game, Seahawks pass rusher Chris Clemons suffered a torn ACL and other significant damage in his left knee that will require surgery and end his season, ESPN reported, citing a source close to the player. The surgery and rehabilitation typically takes as long as 9 months. Clemons led Seattle with 11 1/2 sacks in the regular season.
In a related matter, Seattle coach Pete Carroll and Redskins coach Mike Shanahan both took issue with the playing surface at the Redskins' FedEx Field. There were plenty of bare sports, and dirt was flying with many of the steps taken between the hash marks.
Indianapolis offensive coordinator Bruce Arians returned home from a Baltimore hospital Monday, a day after he missed the team's playoff loss to the Ravens.
Arians, a former Temple coach, is expected to be interviewed for the Eagles' head-coaching job. He also has been linked to the vacancies in Chicago, Cleveland and San Diego.
He was admitted to a Baltimore hospital Sunday with an undisclosed illness, leaving quarterbacks coach Clyde Christensen to call the plays in the 24-9 loss.
* David Akers and Billy Cundiff took their competition to be San Francisco's playoff kicker to Candlestick Park on Monday. Coach Jim Harbaugh said there's a "good chance" both kickers will be on the roster for Saturday's NFC divisional playoff game against Green Bay. He said one is in the lead for the job but wouldn't say who it is. The 49ers (11-4-1) signed Cundiff on Jan. 1 to compete for a job with the struggling veteran Akers, who has made just 29 of 42 field goals this season after connecting on 44 of 52 in 2011.
* Buffalo's 13-season playoff drought is the longest in the NFL, a drought that has devoured four coaches, yet newly named Bills coach Doug Marrone said it was his first choice among the NFL teams that interviewed him. Marrone, hired after going 25-25 in four seasons at Syracuse, noted the numerous ties he's had to New York. Aside from coaching the Orange, Marrone was an offensive lineman at Syracuse in the 1980s.
* Matt Cavanaugh was told he will not return as the New York Jets' quarterbacks coach after four seasons with the team. Cavanaugh's contract was due to expire in a few weeks.
* Dallas running backs coach Skip Peete won't return following the worst 16-game rushing season in team history.