Even though Ben Wheeler, George Worker, Will Young and Andrew Mathieson "have played internationally they are not on the Black Caps' contracts so they are MA-listed players", Malan said.
Veteran batsman Ross Tylor, all-rounder Doug Bracewell and speed merchant Adam Milne are on the national list.
"We [CD] have a decent mix, bar Jesse and Marty Kain who are just white-ball players, the rest of them will be competing for places in all three formats," he said.
Injuries and international duties will no doubt prompt the Stags to reach for players in their wider training squad.
Ryder is back in his home province after stints at Wellington Firebirds and, for the last couple of summers, Otago Volts, but has no interest in playing in the red-ball format.
With Jamie How retired, the former Napier Boys' High School pupil will be pivotal for a side yearning for the glitz and glamour of white-ball cricket.
Left-arm seamer Wheeler has had a taste of the global stage while batsman Young is regularly singled out as a middle-order prospect.
CD Stags
Tom Bruce, Dane Cleaver, Greg Hay, Marty Kain, Andrew Mathieson, Ajaz Patel, Seth Rance, Jesse Ryder, Bevan Small, Ben Smith, Kruger van Wyk, Ben Wheeler, George Worker, Will Young.