Not sure if anyone went to the site, but unless there's a link to another story I missed, it just looks like EA is using his character model in the clip they have up right now. Nothing about him "leaving Sega" to endorse EA. I don't see how it has anything to do with "Another bad business decision for Sega" or "TO being a douchebag". Just by virtue of their license with the NFL PLayer's Association EA is free to show him in the game.
EA probably didn't choose him by accident, but it's just showing his likeness in the game, which really has nothing to do with his endorsement with Sega. I mean I don't mean to ruin the surprise for some people, but he's also included in Madden 2005 and Ray Lewis is still in NFL 2K5.