Cheerleader And Pump Up Crowd Cards
Successfully complete the 'Game Situation' challenges in mini-camp mode. The Cheerleader or Pump Up Crowd Cards for the team used will be unlocked

Easy Tackles
You can get numerous easy tackles with your MLB by using him during your kickoffs. Go to coaching strategies and find 'Kickoff'. Assign the third player from the left to be your MLB. Assign the first two players on the left as very slow CBs or FSs. When you kick off, kick the ball to the left side where your MLB is assigned. If you do not kick it too deeply, your MLB will be the first one downfield and will go unblocked into the return man. If you have the roster space and some money, create a CB and FS and make all of their attributes zeros. You should have no trouble signing them to a contract. You can then use them on your kickoff squad and they will almost never make it downfield. With this trick, in addition to the tackles your MLB gets during the game, he will get one for every kickoff as well

Extra Push In Tackles
When you are a defender about to give a head-on-collision to the runner, press the Right Analog-stick Down to give extra push in your tackles, increasing the chance of a fumble

Faster Player Improvement
Before playing under the All-Pro or All-Madden difficulty settings, play your franchise under the Rookie or Pro levels so you can increase stats for your players easily. This will give them more attribute upgrades throughout the season. The more yards your receivers or running backs get, the more points their ratings will increase

Fight Night 2004 Reference
A song from Fight Night 2004 can be heard in a stadium

Freeze Ball
During your pat try, aim your kick as high as you can with full power. You will see the ball freeze and continue to spin above the mesh behind the FG

Increased Attendance In Franchise Mode
Before playing a home game, enter the 'Owner's' menu and set your 'Advertising' as high as possible. After you play your game, return to the 'Owner's' menu and set 'Advertising' to zero, then simulate the rest of the games for that week. You will not be charged for the advertising, but your attendance will be higher. Do this before every home game to keep your attendance high without paying extra

Madden Card Codes
To enter these codes, go to My Madden at the menu, select My Madden, then go to Madden Codes. Enter the case-sensitive code to unlock the corresponding Card:

P67E1I: TJ Duckett (Gold)
A49H6R: Michael Vick (Gold)

Madden Cards And Game Cheats
Get a gold rank in any event on the All Pro, Pro and Rookie levels in mini-camp mode

Sign Any Player To Low Salary Contract
This trick will allow you to sign any player, no matter how big their default salary is, to a three year low-salary contract. You must do this before starting a franchise. First, edit the player's attributes from whatever they are currently down so that their overall rating is exactly 75. Depending on the position, you should be able to achieve this by simply lowering one or sometimes two of their attributes. Make sure to make a note what the original rating was so you can store the value later. Once all players you are editing are at an overall rating of 75, release the players to free agency. After releasing each player (you may have to sign some 'no-name' players to your roster to maintain roster requirements, but you can release those temporary players later), back out of the roster management screen to the main menu. Choose the option to 'Continue without saving' (this may not be necessary). Reenter the roster management screen and select 'Free Agents.' Go to whichever team you want to sign the players to and start looking for your players. You should notice that their new requested salaries and contract lengths will be for three years at a very low salary (depending on the position). Once you have signed all of your players back (and released the temporary players), go back to editing the players and return them to the original ratings. According to the manual, your players will become upset if they feel they are being underpaid for how good they are performing -- you will more than likely have to re-sign some contracts throughout the year, but with the cap room you will save

Special Card Unlocks
In addition to the normal way to unlock a card, some cards require a specific task to be completed.

Card 2: Earn a Gold in the All-Madden Chase and Tackle drill.
Card 30: Earn a Gold in the All-Madden Coffin Corner drill.
Card 38: Earn a Gold in the All-Madden Ground Attack drill.
Card 42: Earn a Gold in the All-Madden Precision Passing drill.
Card 52: Earn a Gold in the All-Madden Swat Ball drill.
Card 99: Earn a Gold in the All-Madden Trench Fight drill.
Card 104: Earn a Gold in the All-Madden Clutch Kicking drill.
Card 147: Earn a Gold in the All-Madden Pocket Presence drill.
Card 195: Earn a Gold in the Ground Attack drill.
Card 197: Earn a Gold in the Clutch Kicking drill.
Card 199: Earn a Gold in the Swat Ball drill.
Card 208: Earn a Gold in the Pocket Presence drill.
Card 209: Earn a Gold in the Trench Fight drill.
Card 210: Earn a Gold in the Precision Passing drill.
Card 211: Earn a Gold in the Coffin Corner drill