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The Seattle Seahawks have signed former University of Washington receiver Kasen Williams.

Williams was one of the top receivers in the country coming out of high school in 2011. However, a devastating leg injury in 2013 derailed the rest of his college career. Williams broke his leg and suffered a Lisfranc injury in his foot that had lasting effects into his senior season.

After catching 77 passes for 878 yards and six touchdowns as a sophomore, Williams caught just 20 passes for 189 yards and two touchdowns as a senior last year. Williams went undrafted and planned to sign with the Cincinnati Bengals before failing a physical. Instead, he took part in the Seahawks three-day rookie mini-camp in May and impressed enough to get the Seahawks interested.

The team also officially re-signed quarterback Tarvaris Jackson after agreeing to a deal last week.

To clear room on the roster for Williams and Jackson, the Seahawks waived linebacker Mister Alexander and waived/injured defensive end Ryan Robinson.

Robinson had seen snaps with the first-team defense with Michael Bennett skipping OTAs and Cliff Avril tending to the death of father. He suffered a ruptured Achilles tendon. Robinson reverted to Seattle’s injured reserve list after clearing waivers.