Harris (neck) was a full practice participant Thursday.
Harris opened Week 5 prep as a limited participant Wednesday, but the running back's upgrade in activity a day later paves the way for him to be available for Sunday's game against the Jaguars in London. While sharing complementary duties with Latavius Murray behind lead back James Cook through the Bills' first four games, Harris has recorded 19 carries for 80 yards and a touchdown to go with two catches for 16 yards. As long as Cook is healthy and continues to lead the way in Buffalo's backfield, Harris' weekly fantasy upside is modest.