What should I do?

[tylerb418_PSN]

So I think of myself as an average(at best) player on this game. I complete usually get around 325 stars on every inning program and I’m around .500 playing online. I’ve completed all the monthly awards, and most of the player programs. However my team affinities are basically all 0%. I put all of my players that are possible to sell, on the market today. Once everything goes through, I’ll have ~900k stubs. I’ve tried most of the players that are on the market at some point. I’ve decided to finally go for mantle. I know I don’t have enough stubs to get him right now, but I want to try for either Biggio or Sheffield. Which one do you recommend first?