Minnesota Vikings running back Alexander Mattison was the backup to Dalvin Cook for four seasons to begin his career. Mattison was drafted in the third round of the 2019 NFL Draft and only saw six starts from 2019-2022.With Cook's release this offseason, Mattison will assume top running back duties in Minnesota this season. Second-year running back Ty Chandler and rookie DeWayne McBride figure to back up the 25-year-old in 2023, so he should be in store for a big workload as the full-time ...