I think you will see some who are A call ups but dont play regularly. There was some crossover in 2009
This was the 2009 Gold Cup roster
Goalkeepers: Jon Busch (Chicago), Troy Perkins (Valerenga, Norway), Luis Robles (Kaiserslautern, Germany).
Defenders: Steve Cherundolo (Hannover, Germany), Jimmy Conrad (Kansas City), Clarence Goodson (Start, Norway), Jay Heaps (New England), Chad Marshall (Columbus), Michael Parkhurst (Nordsjaelland, Denmark), Heath Pearce (Hansa Rostock, Germany).
Midfielders: Davy Arnaud (Kansas City), Kyle Beckerman (Real Salt Lake), Colin Clark (Colorado), Sam Cronin (Toronto), Brad Evans (Seattle), Stuart Holden (Houston), Logan Pause (Chicago), Robbie Rogers (Columbus).
Forwards: Freddy Adu (Monaco, France), Brian Ching (Houston), Kenny Cooper (Dallas), Charlie Davies (Hammarby, Sweden), Santino Quaranta (D.C. United).
Here was the Confederations Cup roster from that same summer
Goalkeepers Brad Guzan (Aston Villa/England), Tim Howard (Everton/England), Luis Robles (Kaiserslautern/Germany)
Defenders Carlos Bocanegra (Rennes/France), Jonathan Bornstein (Chivas USA/M.L.S.), Danny Califf (Midtjylland/Denmark), Jay DeMerit (Watford/England), Oguchi Onyewu (Standard Liege/Belgium), Heath Pearce (Hansa Rostock/Germany), Jonathan Spector (West Ham United/England), Marvell Wynne (Toronto/M.L.S.)
Midfielders Freddy Adu (AS Monaco/France), DaMarcus Beasley (Rangers/Scotland), Michael Bradley (Borussia Mönchengladbach/Germany), Ricardo Clark (Houston/M.L.S.), Benny Feilhaber (Aarhus/Denmark), Sacha Kljestan (Chivas USA/M.L.S.), José Francisco Torres (Pachuca/Mexico)
Forwards Jozy Altidore (Xerez/Spain), Conor Casey (Colorado/M.L.S.), Charlie Davies (Hammarby/Sweden), Clint Dempsey (Fulham/England), Landon Donovan (Los Angeles/M.L.S.)
This was a little different, because that was two different tournaments in the same summer, while this is just qualification so I would expect a little more crossover.