The Minnesota Vikings might not be able to keep defensive end Ray Edwards.

They did find a way tonight to lock down the services of Brian Robison, who is probably a better all-around end. Robison signed a three-year contract worth $14 million, according to Adam Caplan of FoxSports.com. The deal includes a $6.5 million signing bonus.

Minnesota is in the process of revamping its offensive line this offseason. Tackle Pat Williams is moving on and there is a good chance Edwards will depart. Now, Robison will be in place along with mainstays Kevin Williams and Jared Allen.

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Brad Biggs covers the Bears for the Chicago Tribune