In free agency there are two good players. The first is named Raphael Couture. He starts out as an 83 but his potential is an 99 overall . The second player is named Stratton Whitaker. He starts as a 81 overall but his potential is also 99. Their overall rating will not change in Quick Play mode; it will stay the same . In Season mode, their overall rating also will not change much. Try picking up these players from free agency in Dynasty mode. Because Dynasty mode is four years, it will give both of them a chance to become 99 overall. However, due to the salary cap as the years go by the contracts for both players will expire after they get better. They will want more money. Sign them for the longest time you can get a player, which is three years.