Update: Klinsmann on Saturday said that Guzan would be his No. 1 keeper for the Copa Centenario.
2. Injuries should open up opportunities.
Both Geoff Cameron and Fabian Johnson, who are expected to start at the Copa Centenario, came into camp with injuries, so neither would be expected to start on Sunday.
Update: Neither Cameron nor Johnson accompanied the USA to Puerto Rico.
That will open up opportunities for other players to start, perhaps Matt Miazga alongside John Brooks in the back, and Emerson Hyndman or Alfredo Morales in midfield.
Besides Steffen and Hyndman, five other players aren't eligible for the Copa Centenario -- Caleb Stanko, Paul Arriola, Fabrice Picault, Amando Moreno and Julian Green -- but they all could see action. With only Bobby Wood among the first-team forwards in Puerto Rico, Arriola, Picault or Moreno could earn his first cap.
3. Puerto Rico readies for Caribbean Cup qualifiers.
The U.S. game is a warmup for Puerto Rico's Caribbean Cup qualifiers in June against Grenada and Antigua & Barbuda. Puerto Rico has one MLS player -- NYCFC defender Jason Hernandez -- but he is not in Bayamon. Most of the players hail from local clubs or U.S. colleges.
Among the eight uncapped players is Jeremy Hall, who played for the USA at the 2005 U-17 World Cup. Hall made more than 100 appearances in an MLS career with five clubs and now plays for the NASL's Tampa Bay Rowdies.
Manolo Sanchez made three MLS appearances for the New York Red Bulls in 2015 and is now with San Antonio FC, the new USL club.
GOALKEEPERS (3): *Brad Guzan (Aston Villa), *Tim Howard (Everton), *Zach Steffen (Freiburg II).
DEFENDERS (6): *John Brooks (Hertha Berlin), Eric Lichaj (Nott. Forest), Matt Miazga (Chelsea), *Michael Orozco (Tijuana), Tim Ream (Fulham), *DeAndre Yedlin (Tottenham).
MIDFIELDERS (6): *Alejandro Bedoya (Nantes), Emerson Hyndman (Fulham), *Perry Kitchen (Hearts), Alfredo Morales (Ingolstadt), Caleb Stanko (SC Freiburg), Danny Williams (Reading).
FORWARDS (5): Paul Arriola (Tijuana), Julian Green (Bayern Munich), Fafa Picault (St. Pauli), Amando Moreno (Tijuana), *Bobby Wood (Union Berlin).
*On final Copa Centenario roster.