You will find a "Confidence" stat in CF that impacts specific player ratings from week to week. The number starts at 50 and can go as high as 99. Whenever you switch a player from second string to first, that player gains 5 points, so you can simply switch two players back and forth and exit the depth chart for an easy boost to one player. Then make another swap, and repeat the process as often as desired to max the Confidence stat.