Parker (knee) remained a limited participant at practice Thursday.
Along with Parker, fellow wideout Kayshon Boutte (hamstring) also was a limited participant, and unless one or both practice fully Friday, the two could approach Sunday's game against the Dolphins with questionable designations. Parker was inactive for the Patriots' season-opening loss to the Eagles this past weekend, but when available, he's slated to play a key role in a wideout corps that includes JuJu Smith-Schuster, Kendrick Bourne and Demario Douglas.