Pick "Manage Profiles" at the options menu. Create a new profile and enter Turco813 as a case-sensitive name. Press Start and a message should confirm code entry.
When playing in Franchise mode with any team, go to "Front Office", pick "Rosters", and choose a player that is labeled as "Dressed". Press X when you get to that player, scroll down and choose "Edit Player". Once in the "Edit Player" screen, press L1 and go to "Attributes". Then, give the player a 99 for every skill. As you may imagine, doing this to your whole team makes you kick a lot of ass.
Thanks to Revolution Reader ahahockeydemon80!