According to Pro Football Talk:
First, the Redskins agreed to a deal with quarterback Robert Griffin III, the second overall pick in the draft. Now, a league source tells PFT that the Pats have come to terms with linebacker Dont’a Hightower, the 25th overall selection in round one.
Hightower’s deal has no connection to Griffin’s. Picked at the bottom of the round, Hightower’s floor was set by Texans linebacker Whitney Mercilus at No. 26. But Hightower’s slot hadn’t been fully fixed, given that the three guys in front of Hightower (Browns quarterback Brandon Weeden at No. 22, Lions tackle Riley Reiff at No. 23, and Steelers guard David DeCastro at No. 24) have yet to sign.