The U.S. men's national team will operate two camps in January at IMG Academy in Bradenton, Florida.
Gregg Berhalter called in 12 players for the senior team camp, while Jason Kreis named 26 players for the U-23 camp.
Both camps open Jan. 9 and run through Jan. 24, and they will end with an international match against an opponent to be named later (likely Serbia) at the end of January. The senior team will be bolstered by players called up from the U-23s. They will
GOALKEEPERS (2): Sean Johnson (New York City FC; 9/0), Matt Turner (New England Revolution; 0/0)
DEFENDERS (3): Tristan Blackmon (LAFC; 0/0), Aaron Long (NY Red Bulls; 18/3), Walker Zimmerman (Nashville SC; 13/2)
MIDFIELDERS (3): Kellyn Acosta (Colorado Rapids; 24/2), Sebastian Lletget (LA Galaxy; 17/4), Cristian Roldan (Seattle Sounders FC; 19/0)
FORWARDS (4): Jozy Altidore (Toronto FC; 115/42), Paul Arriola (D.C. United; 34/6), Jordan Morris (Seattle Sounders; 39/10), Chris Mueller (Orlando City SC; 1/2).
Six of the 12 players took part in the USA's 6-0 win against El Salvador in December, including Chris Mueller, who scored two goals and added two assists in his first match for the USA at any level.
Jozy Altidore returns to the national team for the first time since the 2019 Gold Cup. He will be the oldest player in camp at the age of 31.
Matt Turner and Tristan Blackmon are the lone uncapped players.
GOALKEEPERS (3): JT Marcinkowski (San Jose Earthquakes), David Ochoa (Real Salt Lake), Brady Scott (Austin FC)
DEFENDERS (10): Julian Araujo (LA Galaxy), George Bello (Atlanta United), Chris Gloster (PSV Eindhoven/NED), Aaron Herrera (Real Salt Lake), Aboubacar Keita (Columbus Crew), Henry Kessler (New England Revolution), Mauricio Pineda (Chicago Fire), Bryan Reynolds (FC Dallas), Miles Robinson (Atlanta United), Sam Vines (Colorado Rapids)
MIDFIELDERS (6): Hassani Dotson (Minnesota United), Bryang Kayo (Wolfsburg/GER), *Andres Perea (Orlando City), Tanner Tessmann (FC Dallas), Eryk Williamson (Portland Timbers), Jackson Yueill (San Jose Earthquakes)
FORWARDS (7): Cade Cowell (San Jose Earthquakes), Daryl Dike (Orlando City), Jeremy Ebobisse (Portland Timbers), Jesus Ferreira (FC Dallas), Jonathan Lewis (Colorado Rapids), Benji Michel (Orlando City), Djordje Mihailovic (Montreal Impact)
*Requires switch of association to represent USA.
Kreis will gather the U-23s for the only time head of the Concacaf Olympic qualifying tournament in March in Guadalajara.
The U-23s include 24 MLS players in addition to two players currently under contract with European teams, Chris Gloster, who is expected to leave PSV after a season and a half with its second-tier Jong PSV, and Bryang Kayo, who plays for Wolfsburg II in Germany's fourth-tier Regionalliga.
Ten of the 20 players called up for Olympic qualifying in 2020 will be in the camp. The U-23s have not met since then though four players who will be Bradenton played in the 6-0 win over El Salvador: Julian Araujo, Sam Vines, Jackson Yueill and Djordje Mihailovic.
Players range in age from 23 to 17. Jeremy Ebobisse, who turns 24 in February, is the oldest Cade Cowell, who turned 17 in October, is the youngest. Players born on or after Jan. 1, 1997, remain eligible for the men's soccer tournament.
Araujo, Cowell and Kayo are among seven players born in 2001 or later, making them age-eligible for the 2024 Summer Olympics. The others are George Bello, David Ochoa, Bryan Reynolds and Tanner Tessmann.