Hodgson has failed to recover from a hamstring injury, which saw the fullback leave the field prematurely for Warrington against Leeds.
Shannon McDonnell will directly replace Hodgson, while Sia Soliola moves from the second row to the centres to replace Sa.
David Fa’alogo, who was originally brought into the squad as 18th man, will start at loose forward. while Trent Waterhouse will occupy Soliola’s original second row spot.
The fixtures have been confirmed for the 2015 Magic Weekend at St James’ Park in Newcastle.
Wakefield have signed Australian utility back Jacob Miller from Hull.
Hull Kingston Rovers have added another recruit to coach Chris Chester's squad, with prop forward Mitchell Allgood arriving from NRL outfit Parramatta Eels.
Bradford legend Robbie Hunter-Paul has teased at a possible on-field return after being unveiled as the honorary president of new club, Mirfield Stags.