Washington didn't get many touches as a Husky. In 2015, he only carried the ball 47 times for 282 yards and four touchdowns.
That being said, Washington is an excellent athlete. He ran a 4.44 40-yard dash at his Pro Day and became known in Seattle for breaking out the occasional long runs. However, he struggled with fumbles throughout his career and has some vision issues.
In Detroit, Washington is going to compete in a crowded backfield. He won't usurp the likes of Ameer Abdullah, Stevan Ridley, or Theo Riddick, but he could compete for Zach Zenner or George Winn's spot on the roster.