Ive noticed that when you scout a player (via a scouting trip) from level 3 to level 4 while having his player card up, you will see green, blue, black, and yellow ratings. Some of those yellow ratings are actually red. When you close out the player card and bring it back up, you will now see all the colors, including red. Its a minor glitch I've noticed since 3.0 was rolled out.