Put the following in your user name:

AE3278 - AFC East All-Star Team 
AN6789 - AFC North All-Star Team 
AS6884 - AFC South All-Star Team 
AW9378 - AFC West All-Star Team 
NE3278 - NFC East All-Star Team 
NN6789 - NFC North All-Star Team 
NS9378 - NFC South All-Star Team 
NW9378 - NFC West All-Star Team 
Travel - All Stadiums
nw9378 - Get NFC West
as76884 - Get NFC West + AFC South
nn6789 - Get NFC West + AFC South + NFC North
KaySlay - Get Team Kay Slay
Classic - NFL Legends Team
Excellent - Team Xecutioner 

Unlock Teams:
Kayslay - Defeat the second ladder team in NFL Challenge. 
NFL Legends - Defeat the first ladder team in NFL Challenge. 
X-Ecutioners - Defeat the fourth ladder team in NFL Challenge. 
AFC East All-Star Team - Beat the NFL Challenge for the AFC East. 
AFC North All-Star Team - Beat the NFL Challenge for the AFC North. 
AFC South All-Star Team - Beat the NFL Challenge for the AFC South. 
AFC West All-Star Team - Beat the NFL Challenge for the AFC West. 
NFC East All-Star Team - Beat the NFL Challenge for the NFC East. 
NFC North All-Star Team - Beat the NFL Challenge for the NFC North. 
NFC South All-Star Team - Beat the NFL Challenge for the NFC South. 
NFC West All-Star Team - Beat the NFL Challenge for the NFC West. 

Unlock All-NFL Pick-Up Game:
Complete all ladder challenges of every conference in NFL Challenge mode. 

Unlock NFL All-Stars Player:
Defeat the NFL All-Stars in the NFL Challenge Mode.

X-Ecutioners: 
Defeat the fourth ladder team in NFL Challenge.