For what I've reading, Pampas has almost all players from buenos aires union's clubs, except for a couple, and Dogos has all players from the rest of the provinces. Here are the squads:
Pampas: Javier Corvalán (pilar / Deportiva Francesa), Matías Medrano (pilar / Regatas de Bella Vista), Miguel Prince (pilar / Newman), Rodrigo Martínez (pilar / Los Tordos), Ramiro Gurovich (hooker / Club Atlético Estudiantes), Valentino Minoyetti(hooker / Buenos Aires C&RC), Rodrigo Pérez Boulan (hooker / Lomas Athletic), Javier Coronel (pilar / Universitario de La Plata), Martín Villar (pilar / Lomas Athletic), Renzo Zanella (pilar / Comercial RC), Lorenzo Colidio (segunda línea / Duendes RC), Jerónimo Ureta (segunda línea / Newman), Franco Carrera (segunda línea / San Cirano), Rodrigo Fernández Criado (segunda línea / Belgrano Athletic), Eliseo Fourcade (segunda línea / Pucará), Federico Lavanini (segunda línea / Hindú Club), Manuel Bernstein (ala / Club de Rugby Ateneo Inmaculada), Eliseo Chiavassa (ala / Los Tilos), Nicolás D'Amorim (ala / Hindú Club), Felipe Bares (ala / Los Tilos), Benjamín Grondona (octavo / Champagnat), Santiago Ruiz (octavo / Regatas Bella Vista), Mateo Albanese (medio-scrum / SIC), Tomás Di Biase (medio-scrum / Deportiva Francesa), Rafael Iriarte (medio-scrum / CUBA), Eliseo Morales (medio-scrum / Universitario de Salta), Joaquín de la Vega Mendía (apertura / Hindú Club), Joaquín Lamas (apertura / SIC), Tomás Suárez Folch(apertura / La Plata RC), Tomás Passaro (wing o fullback / CUBA), Jerónimo Ulloa (wing / Newman), Manuel Alfaro (centro / Banco Nación), Felipe de la Vega (centro / CUBA), Juan Pablo Castro (centro / San Juan RC), Santiago Castro (wing/ San Martín), Iñaki Delguy (wing / Pucará), Igancio Lucero (wing / Mendoza RC), Mateo Pannochia (wing / Los Tordos), Benjamín Elizalde (fullback / Tigres RC) y Juan Ignacio Landó (fullback / Belgrano Athletic). (There are more from the interior that ehat I remembered)
Dogos: Juan Cruz Strada (Santa Fe Rugby), Juan Mernes (Estudiantes de Paraná), Lautaro Cipriani (Tilcara), Manuel Todaro (Universitario de Rosario), Román Pretz (Duendes), Ignacio Gandini(Duendes), Valentino Di Capua (Duendes), Francisco Diez (Duendes), Franco Giudice (GER), Juan Bautista Baronio (Jockey Club Rosario), Mateo Núñez (Alma Juniors, de Esperanza), Tomás Bartolini (Marista RC), Aitor Bildosola (Los Tordos), Julián Hernández (Marista RC), Ernesto Giudice (Mendoza RC), Lautaro Peralta (Mendoza RC), Leonardo Gea Salim (Universitario de Salta), Mariano García Azcarate (Universitario de Salta), Facundo García Hamilton (Tucumán Rugby), Santiago Pulella (Jockey Club de Córdoba), Octavio Filipa (Jockey Club de Córdoba), Franco Molina (Jockey Club de Córdoba), Efraín Elías (Jockey Club de Córdoba), Agustín Segura (Jockey Club de Córdoba), Agustín Moyano (Córdoba Athletic), Boris Wernger (Jockey de Villa María), Ramiro Valdez (La Tablada), Gregorio Hernández (Tala), Lautaro Simes (Tala), Valentín Soler (Tala), Mateo Soler (Tala), Octavio Barbatti (Jockey Club de Córdoba), Nicolás Viola (Jockey Club de Córdoba), Felipe Mallía (Jockey Club de Córdoba), Francisco Udrisard (La Tablada), Federico Albrisi (Tala), Valentín Cabral (Córdoba Athletic) y Faustino Sánchez Volarolo (Palermo Bajo).
Apparently there are 101 argentine players on the competition, the only team without are peñarol and selknam, apparently to prepare for the world cup
Source
Its a good increased of the profesional pool, between this and all the players on the US and Europe. I think there were couple on super rugby too.
Would be nice to keep increasing the pool with a team in Tucuman soon.
The first much was pretty entertaining. It was nice to see people on the stands, hear the shouting and all. Hopefully the game keeps getting better and more competitive and having the stadiums on rugby hotspots like now would keep getting more people to the stands