Campbell, chosen fourth in the NFL Draft, agreed to a four-year, $43.66 million contract with a $28.39 million signing bonus. Patriots first-round pick Will Campbell has signed his rookie deal. The 21-year-old, a left tackle at Louisiana State, has been working with the Patriots’ starting offensive line during the spring.

The 6-foot-6-inch, 319-pounder was a first-team All-American last year, and a finalist for the Lombardi Award, given annually to the nation’s top lineman. Second-round pick TreVeyon Henderson and fourth-round choice Craig Woodson are New England’s only remaining unsigned rookies. Christopher Price can be reached at christopher.price@globe.com.

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