Other players under serious consideration will be players from the 2019 U-20s at European clubs: Chris Richards, Chris Gloster, Chris Durkin, Alex Mendez and Richie Ledezma and Tim Weah.
In addition, such European-based players as Christian Pulisic, Tyler Adams, Sergino Dest, Weston McKennie and Josh Sargent are all also age-eligible though the chances that they will be released are very slim.
Mexico. Mexico is the top seed as an Olympic 2016 qualifier along with Honduras, the Group B top seed. It failed to get out of the group stage at the Olympics four years ago in Brazil after winning gold for the first time at the 2016 London Olympics.
After their December meeting, Liga MX clubs issued a statement of support for the Olympic effort and Mexico's U-23 coach Jaime Lozano. The Preolímpico starts the same weekend as Round 11 of the Torneo Clausura.
Mexico called up 13 age-eligible players to the senior national team for the final two matches in the Concacaf Nations League in November. Players from its 2019 Gold Cup championship Mexico can drawn upon are Edson Alvarez, Carlos Rodriguez, Roberto Alvarado, Alexis Vega, Cesar Montes and Uriel Antuna.
Costa Rica. The Ticos have qualified for the Olympics only three times: 1980, 1984 and 2004. They are one of three teams to advance from Central America along with Honduras and El Salvador.
Costa Rica U-23s feature a trio of age-eligible players in MLS: Randall Leal (FC Cincinnati), Luis Diaz (Columbus) and Marvin Loria (Portland). Only Leal played (and scored) in qualifying series against Guatemala (3-0 win away, 2-0 loss at home).
Dominican Republic. The Dominican Republic created a surprise when it beat Saint Kitts & Nevis, 2-0, on the road in overtime in the final round of Caribbean qualifying to reach the Concacaf under-23 finals for the first time. (Haiti beat Barbados, 4-0, to grab the other Caribbean berth.)
The DR goals were scored by Ronaldo Vasquez and Dorny Romero, both regulars on the senior national team.
Group A Schedule:
Friday, March 20 (Jalisco Stadium)
USA vs. Costa Rica
Mexico vs. Dominican Republic
Monday, March 23 (Akron Stadium)
USA vs. Dominican Republic
Mexico vs. Costa Rica
Thursday, March 26 (Jalisco Stadium)
USA vs. Mexico
Costa Rica vs. Dominican Republic