Harris, a safety, joined Minnesota as an undrafted free agent in 2015. Brown, a running back, was claimed off waivers last fall after his release from Washington.
Harris played in all 16 games and started three in place of Andrew Sendejo last fall. He delivered one of the most important Vikings takeaways of 2017 when he forced a fumble by Rams receiver Cooper Kupp just shy of the goal line.
Brown made his Vikings debut at Carolina, returning one kickoff 17 yards.
Harris recently swung by Twin Cities Orthopedics Performance Center, the Vikings new headquarters, and Vikings.