Jared Allen underwent knee surgery on Jan. 31, the same day he had the shoulder repaired, two NFL sources said.

Allen categorized the knee surgery as a "minor" cleanup job.

Allen said he hadn't had surgery since getting his tonsils out at the age of five.

Allen is coming off two surgeries as he enters the last season of a contract that includes a team-high base salary of $14,280,612 and cap number of $17,063,956.

Greg Jennings has agreed to sign with the Minnesota Vikings on a five-year deal.

Jennings was limited to just eight games in 2012.

Jennings had at least 900 yards receiving with the Packers in each season between 2007 and 2011.

The Packers selected Jennings in the second round in 2006 and quickly replaced Javon Walker as their featured wide receiver.

Matt Cassel has agreed to sign with the Minnesota Vikings.

Cassel, who was released by the Chiefs on Thursday, is expected to compete for the starting quarterback job with the Vikings.

Christian Ponder was the starter last season for the Vikings.

Greg Jennings is visiting with the Minnesota Vikings as he explores free agency.

Jennings is admittedly in no rush to make a decision.

"I want to experience it. I'm not one to jump the gun, I try to look at myself and believe I'm a pretty smart guy," Jennings told ESPN. "I want to weigh out all my options. I want to make sure I end up in a place where my family is going to be happy as well as myself and I can thrive."

The Minnesota Vikings have re-signed Jerome Felton.

Felton was named to the 2012 Pro Bowl.

"Thanks to MN VIKINGS!!" Felton wrote on Twitter. "I'm back and excited about the future!!!!"

The Vikings averaged 6.3 yards per carry when Felton was at fullback, according to Pro Football Focus.

The Minnesota Vikings have agreed to a multi-year contract with Phil Loadholt.

Loadholt has been right tackle with the Chicago Bears.

The Minnesota Vikings have released Antonie Winfield.

Winfield was asked to take a pay reduction by the Vikings.

Winfield has been with the Vikings since 2004 and was a Pro Bowl selection at cornerback in 2008, 2009 and 2010.

The Minnesota Vikings finally traded Percy Harvin on Monday.

The impetus to the trade was Harvin's criticism of quarterback Christian Ponder, according to sources.

Harvin was always one of Ponder's favorite targets.

Harvin also was seeking a new contract that paid him nearly as much as top receivers such as Calvin Johnson and Larry Fitzgerald.

The Seattle Seahawks have agreed to a trade for Percy Harvin from the Minnesota Vikings in exchange for draft picks.

The deal is complete pending Harvin passing a physical.

Harvin was limited to nine games in 2012, catching 62 balls for 677 yards.

The Seahawks will send their first and seventh round pick this year, as well as a mid-round pick next year.

The Minnesota Vikings are in trade talks involving Percy Harvin with several teams including the Seattle Seahawks, according to sources.

Harvin has been seeking a new contract from the Vikings.