Niall Corcoran, Simon Lambert and Justin Burke will all make their championship debuts for Dublin in Sunday's Leinster SHC quarter-final clash with Westmeath (Portlaoise, throw-in 3.50pm).
Corcoran, who hails from Clonfert, County Galway, is one of three players in the named Dublin team who are playing for their adopted county.
The 25-year-old Corcoran won an All-Ireland minor title with Galway in 2000.
But he has thrown his lot in with the Dubs now and will start at right corner back on Sunday, with regular corner backs Philip Brennan and Patrick Bergin both out injured.
Waterford native Burke, a club-mate of Corcoran's at Kilmacud Crokes, and another Galwayman, Declan Qualter, will link up with the experienced Kevin Flynn (32) in the Metropolitans' half-forward line.
Dublin's other debutant, Ballyboden St. Enda's clubman Lambert, will partner John McCaffrey at midfield.
Sunday's game will be the second championship meeting between the Dubs and Westmeath in three years.
The Lake county claimed a 0-13 to 0-11 victory in 2006 for only their second Leinster championship success over Dublin in 17 encounters.
Tommy Naughton's men are expecting a tough test from Westmeath, who are the reigning NHL Division 2 champions.
Dublin have not qualified for a Leinster SHC final since 1991 but after last year's one-point semi-final defeat to Wexford, full-back and captain Stephen Hiney is determined to see his side through to the provincial decider.
"Two years ago, in the floods in Portlaoise, Westmeath got the result so we'll be taking this game very seriously," Hiney admitted.
"Realistically we are probably fighting for the position of second best team in Leinster behind Kilkenny. We'd love a bite at Wexford in the semi-final if we beat Westmeath."
Should the Dubs progress this weekend, they will set up a rematch with Wexford on June 14.
DUBLIN (SHC v Westmeath): G Maguire; N Corcoran, S Hiney (capt), T Brady; M Carton, R Fallon, J Boland; S Lambert, J McCaffrey; J Burke, D Qualter, K Flynn; D O'Callaghan, J Kelly, P Carton.