Valentine made his professional debut in the season opener against the Arizona Cardinals, where he recorded his first career sack against quarterback Carson Palmer.
On February 5, 2017, Valentine was part of the Patriots team that won Super Bowl LI. In the game, the Patriots defeated the Atlanta Falcons by a score of 34–28 in overtime.[8]
On September 22, 2017, the Patriots placed Valentine on injured reserve after dealing with a knee injury.[9] The Patriots made it to Super Bowl LII without Valentine, but lost 41–33 to the Philadelphia Eagles.
On September 1, 2018, Valentine was waived by the Patriots and was signed to the practice squad the next day.[10][11] He was released on October 8, 2018.[12]
Arizona Cardinals (first stint)
On October 31, 2018, Valentine was signed to the Arizona Cardinals practice squad.[13] He was released on November 27, 2018.[14]
Seattle Seahawks
On December 4, 2018, Valentine was signed to the Seattle Seahawks practice squad after a tryout the previous day.[15]
Arizona Cardinals (second stint)
On December 11, 2018, Valentine was signed by the Cardinals off the Seahawks practice squad.[16] He was waived/injured on August 7, and reverted to injured reserve after clearing waivers on August 8. He was waived from injured reserve on August 30, 2019.
Personal life
In college, he was a journalism major, and earned a spot on the Nebraska Scholar-Athlete Honor Roll in the spring of 2013. Valentine also volunteered his time with Uplifting Athletes and part of team hospital visits while with the Huskers.