Lee, who is in charge of the Magpies while head coach Craig Philpott is in England as an assistant coach with the Baby Blacks at the Under-20 World Cup, said all of the 27 would still be available for club play today.
Nine contracted Magpies are in the squad and a further three - winger Mason Emerson, utility back Lewis Marshall and halfback Ellery Wilson - are being rested.
Most of the in-form club players have been given the opportunity to play, including the co-leaders of the MVP competition, Hastings Rugby and Sports second five-eighth Neria Fomai and Clive No 8 Lucas Goodin who will get game time off the pine.
Promising Napier Old Boys Marist halfback Zac Donaldson will start in the No 9 jersey.
He is one of two members of last year's St Pat's Town 1st XV which won Wellington's College Premiership who are in the squad.
Lock-loosie Hannon Brighouse will get game time off the subs bench and the third member of their school team who came to the Bay, loosie Jack Nelson-Murray, is injured.
-Magpies team for the match on the artificial turf in Masterton: Star Timu, David Benson, Matt Garland, Neria Fomai, Ethan Prichard, Tianua Poto, Zac Donaldson, Joseph Penitito, Ben Hamelink, Matt Gardiner, Trent Boswell-Wakefield, Sanaila Waqa, Tolu Fahamokioa, Jorian Tangaere, Jason Long.
Substitutes, forwards: Logan Ede, Mark Braidwood, Jarvy Aoake, Tamatoa Higgins, Ben Parsons, Hannon Brighouse, George McPherson, Lucas Goodin.
Backs: Chris Eaton, Dan Snee, Cole Eru, Shannan Chase.
-Injured: Mason Kean, Max Fryatt, Jack Nelson-Murray, Tiaan Falcon.
-Not required: Joe Simeon, Hugh Graham, Ben Taylor, Tom Bywater, Kody Lancaster, Sean Skeet.
-Unavailable: Pouri Rakete-Stones, Kaleb Whakataka.
-Rest: Mason Emerson, Lewis Marshall, Ellery Wilson.