Detroit's sixth-round draft pick (200th overall) in 2015 out of Texas, Diggs is entering his fourth NFL season. He has appeared in 44 career games with 19 starts. His career totals include 131 tackles (110 solo), three interceptions, 16 pass defenses, three forced fumbles, one fumble recovery and one sack.
''Quandre has developed into one of our core defensive players and we are excited to come to this agreement that will have him as a Detroit Lion for the next four seasons.'' Lions executive vice president and general manager Bob Quinn said.
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