Chad Pennington has elected to undergo a third surgery to his right shoulder to repair a torn capsule, sources said. When he travels Friday to Birmingham, Ala., Dr. James Andrews will perform the procedure. Andrews has performed each of the other two surgeries on Pennington's shoulder in 2004 and 2005. The capsule is a sheet of tough fibers and fluid that surround the shoulder joint and hold the joint in place.

The Kansas City Chiefs have traded QB Tyler Thigpen to the Miami Dolphins in exchange for an undisclosed selection in the 2010 NFL Draft. Thigpen (6-1, 224) played in 16 games (11 starts) in three seasons with Kansas City (2007-09). He completed 232 of 426 passes for 2,649 passes with 18 TDs and 13 INTs for a 74.7 rating. He added 63 carries for 388 yards with three TDs. He also caught a 37-yard TD pass in 2008. Thigpen was claimed off waivers by Kansas City from Minnesota in 2007 after originally entering the NFL as a seventh-round pick (217th overall) of the Vikings in the 2007 NFL Draft.

Chad Pennington has been initially diagnosed with a torn capsule in his throwing shoulder and the Dolphins expect him to miss the rest of the season, sources familiar with the injury told ESPN's Chris Mortensen. Pennington will seek a second opinion from orthopedic specialist Dr. James Andrews, who has performed two shoulder surgeries on the quarterback. Pennington has already had surgery on the same shoulder in 2004 and 2005. Chad Henne, who went 10 for 19 for 92 yards with an interception, will likely make his first NFL start Sunday when the winless Dolphins play host to Buffalo. "We're going to have to go out there with Henne, who is a lot less experienced," tight end Anthony Fasano said. "There is definitely going to be a learning curve for Henne. He can learn as much as he wants in a classroom, but until he's out on the field, in-game experience he's not going to learn. "But we have a lot of faith in Chad. He's a smart guy, a great leader and fun to play with. We're just going to have to move on."

The Dolphins are expected to rotate a host of wide receivers in their second starting spot. Tedd Ginn Jr. will enter the season as Miami's top receiver. Greg Camarillo, Davone Bess and Brian Hartline should be time on the field as the second option.

Ricky Williams has signed an extension with the Dolphins through the 2010 season. Williams, 32, is scheduled to earn a base salary of $3.4 million this season and $4.35 million in 2010, according to ESPN. "There's very strong feelings about Ricky and what he's done for us -- and certainly for me -- since he's been here," Dolphins coach Tony Sparano told The Miami Herald. "From what he brings from a work-ethic standpoint, as a pro in the meeting rooms, he's a good ambassador of our message to the younger players." Williams plans to retire after the 2010 season.