Cheats > Game > Cheat: 26316

Better franchise or expansion mode teams
Use trades to get rid of your older less talented players for slightly better players. Even if the CPU rejects your trade, keep trying repeatedly and it will usually eventually accept it. However, make the trade reasonable, such as a B- player for a B or B+ player. If the player you really want just does not seem to want to join your team, try trading for another player who is slightly better, then return to that player you want and try again. Do this every season to keep good young players.