Here you guys go, all 4 ultimate season 1 masters. Kittle and Linval have power-ups, no word of powerups for Hester or Seau yet. These get all team chems!
How to Upgrade: Season Collectibles at the following levels: 5, 15, 25, 35, 45. each collectible brings the ovr (of Hester and Seau) up by 2 ovr. you can't upgrade linval joseph or george kittle however they DO go into their respective power ups