Sol is a bit of a strange one, have you ever seen anyone play like he does? I'm not sure how much football hw has played throughout his career or what his injury record is like, those would be factors in his longevity, he also has that ranginess in his body that seems to serve athletes well later in their career as oppossed to the stocky, powerful shape. I think that the question is with his injury, will he lose a yard or become a different player? If all goes well then i don't think that he'll become old overnight.