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Sione Vaki
Vaki is another draft bust that Brad Holmes probably wishes he could rectify. Vaki has lost a role in the Lions' special teams unit thanks to numerous injuries suffered in the preseason and regular season. He also never established a role in the running back room because of those injuries. Former UFL running back Jacob Saylors had more of a role than Vaki.
It's likely that the Lions look to move on from him this season, especially given the emergence of Tom Kennedy as a great kick returner. This is a draft pick that the Lions are likely okay with parting ways with, especially with how little they've seen out of the relationship.