Witherspoon. Could he secure the MLB into next season?

Looking at Spoon on the field he looks like a strong 240 to 245pds. I think fans are basing their judgement of Witherspoon being a permanent fixture at MLB based on his weight. I dont believe that Stewart Bradley owns the position. A bad knee at MLB is major disadvantage when playing that position and if Spoon continues at this level I dont see any rationale for moving him next season to the outside. Byron Evans wasnt big and was probably the best MLB I can remember watching in an Eagle uniform. Gocong has almost the same physical sttributes of Bradley he would be a a safer choice upon Bradleys return. But give me your thoughts on moving Spoon.