This information comes courtesy of the LA Galaxy's website - i.e. not 100% official from Chelsea - so perhaps it'll prove not entirely accurate. We'll find out I suppose.
Goalkeepers: Petr Cech, Mark Schwarzer, Jamal Blackman
Defenders: Branislav Ivanovic, Ashley Cole, David Luiz, Gary Cahill, John Terry, Cesar Azpilicueta, Tomas Kalas, Ryan Bertrand
Midfielders: Michael Essien, Ramires, Frank Lampard, Juan Mata, Oscar, John Obi Mikel, Kevin De Bruyne, Marco van Ginkel, Eden Hazard
Forwards: Fernando Torres, Victor Moses, Andre Schurrle, Romelu Lukaku, Demba Ba
Not that there should be any surprises. We already knew that with the Confederations Cup contingent rejoining after their extended vacations, we will be seeing a much more senior side in the USA. And so in come the six of Azpilicueta, Mata, Torres, Mikel, David Luiz, and Oscar; out go the six of Wallace, Piazon, Traore, Chalobah, Feruz, and McEachran. Not sure what's going on with Kenneth Omeruo and his recovering shoulder.
You can check out the rest of the 25-man rosters at the Galaxy's website, including a name that should be familiar to all at Valencia.