The Seahawks claimed McKissic, an undrafted rookie in 2016, off waivers in December 2016. He appeared in one game as a rookie, carrying the ball one time for two yards and catching two passes for 16 yards.
The 25-year-old then became an overnight sensation in Seattle's Week 4 win over the Indianapolis Colts last season. He had 38 yards and a touchdown on four carries and caught a 27-yard touchdown pass in the fourth quarter.
By season's end, McKissic racked up 453 all-purpose yards and three touchdowns.
Encouraging production and all, the Seahawks shouldn't skip a beat while he's on the shelf.
Rookie Rashaad Penny is expected to be ready for Week 1 after suffering a finger injury, according to ESPN.com's Brady Henderson, and he should team up with Chris Carson to create an imposing one-two punch right out of the gate.