...and then there was no one left to sign. According to Ian Rapoport of NFL Network, defensive tackle Malcom Brown and the New England Patriots have finally agreed on a contract (EDIT: according to the Boston Globe's Ben Volin it is a 4-year deal worth $7.6M, including a $3.8M signing bonus):
First round DT Malcom Brown has agreed to terms with the #Patriots on his 4-year rookie deal, source said.— Ian Rapoport (@RapSheet) June 19, 2015
The Patriots selected the 21-year old with the 32nd and last pick of the first round of the 2015 NFL Draft after Brown played his three-year collegiate career with the Texas Longhorns. He was a consenus All-American in 2014 and considered as one of the best picks of this year's draft.
Brown (6'2'', 320 lbs), who was one of the last members of his draft class to sign a deal, joins a defensive tackle depth chart consisting of 2014 first round pick Dominique Easley and veterans Alan Branch and Sealver Siliga (among others). He projects to play a prominent role in 2015, especially since the contract option of long-time starter Vince Wilfork was not exercised by the team in March and Wilfork subsequently signed with the Houston Texans.
With Brown signed, the Patriots' entire 2015 rookie class is now under contract and officially obliged to "do its job".