If Calzaghe took the fight at a catchweight, he would only have 4 moths left after the fight to defend his belts against someone ranked in the top 15 by the WBO + IBF or they would strip him of his belts.

So with him looking to move up to fight Traver, or the chance of him hurting his hand if he fought johnson, or after the fight then there is a valid reason why he wants to fight at SMW. Hes not to far off beating Joe Louis' record for being the longest raining champion; why f*** that all up to fight johnson at some catchweight?