Source: Brandon Spikes has surgery

New England Patriots linebacker Brandon Spikes underwent a medical procedure on his right knee Tuesday, a source familiar with the procedure said after the linebacker tweeted earlier that he was having surgery.

No further information about the surgery was available.

Spikes, who missed seven games with a sprained MCL, was one of the Patriots' rising players late in the 2011 season. The 2012 campaign will be his third in New England.

Spikes had tweeted the following around 6:30 a.m.: "Surgery this am!!!! Y'all pray 4 me please. #PoWwWwW!"

Spikes, who has 31,000-plus followers, is one of the more active players on Twitter (@BrandonSpikes55).

The Patriots' offseason program can start as early as mid-April. While Spikes figures to be monitored carefully, the surgery is not expected to have a major impact on his ability to participate in the team's program if he chooses to do so.

The 6-foot-2, 250-pound Spikes, who played in eight regular-season games (6 starts), finished with 47 tackles and one pass defensed.

He was at his best in the playoffs, starting all three games and providing a solid presence in the middle of the field, both as a physical tackler in the run game as well as in coverage (interception in AFC title game). He also had a sack in the divisional-round win over the Broncos, while totaling 11 tackles and forcing a fumble in the loss to the Giants in Super Bowl XLVI.

Mike Reiss covers the Patriots for ESPNBoston.com.