Mattison had two carries for five yards and lost five yards on two receptions in Sunday's 20-16 loss to Dallas.
Mattison played eight snaps on offense as he had a minimal role with Dalvin Cook fully healthy. Mattison eclipsed 100 rushing yards in both spot starts when Cook has sat out this season, so he's one of the more valuable backups in the league. However, Mattison likely will have minimal fantasy value most games when Cook is healthy.