Man i grew up in California and Marion Butts was one of my favorite old school players when he was with the Chargers. That was a personal decision to inlcude him because of his physical running style and wanted him to compliment Dunn as the Big RB.
I'll definetly consider replacing Johnson with Weldon at a later date.
What I would do is instead of using Butts on you guys PS3 file just create Allen and find a player in Madden that has similiar skills as him then utilize those ratings or if I'm not mistaken you might be able to leave Butts and just use the create a player feature and add him to the team.
You guys can switch out any player you desire remember these rosters are just for fun and sometimes i leave out great players on each team. Just do like one of the other posters and add your own players if I missed someone that was more deserving of being on the team. I don't mind if you guys alter some players because we all have our favorites.
I hope i didn't offend any FSU fans nothing against Allen but Butts was a child hood favorite of mine growing up.