This glitch will max out your MyCareer players stats and skills without actually needing the Skill Points to purchase them in the first place. After signing off from PSN/XboxLive/etc, make your character and go through the Rookie Showcase. Once done, play the season until ou earn 500 SP, then purchase the Ray Allen Signature Layup from the store. You'll end up having a negative amount of SP, allowing you to max our your attributes and signature skills. Note: This may only work on the PS3 version.