Because when Phelps came over to the UK, Wigan signed him rather than having to go a pretty average NL1 team? Phelps is proven in SL, lives in the area and appears to be a true pro as opposed to Taulapapa who, allegedly, has a questionable attitude. Also, a few Sheffield fans say he isn't the same since returning from his broken leg.
Don't get me wrong, in a way I'm glad you've made such average signings for next year - Although, I'd prefer to see young Hull lads getting a chance (at both clubs).