Two players left U.S. Men’s National Team camp due to injury while a third is set to join his MLS club team ahead of preseason.

Kellyn Acosta, Matt Hedges and Kekuta Manneh departed USMNT camp, leaving the roster at 28 players ahead of the team’s two scheduled friendlies. Acosta’s departure was caused by a mild left ankle sprain, according to U.S. Soccer, whileS Hedges is dealing with a mild sprain in his right knee.

Manneh, meanwhile, joins the Vancouver Whitecaps for preseason in Wales. The Whitecaps forward recently received his citizenship but is not yet eligible to represent the USMNT as paperwork is finalized.

The U.S. is set to take on Serbia on Sunday in the first of two friendlies scheduled for the camp, which ends on Feb. 2 with a clash against Jamaica.

Here’s a closer look at the full U.S. roster following the departures:

GOALKEEPERS: David Bingham (San Jose Earthquakes), Nick Rimando (Real Salt Lake), Luis Robles (New York Red Bulls), Brian Rowe (LA Galaxy)

DEFENDERS: DaMarcus Beasley (Unattached), Steve Birnbaum (D.C. United), Brad Evans (Seattle Sounders FC), Greg Garza (Atlanta United FC), Taylor Kemp (D.C. United), Chad Marshall (Seattle Sounders FC), Keegan Rosenberry (Philadelphia Union), Walker Zimmerman (FC Dallas), Graham Zusi (Sporting Kansas City)

MIDFIELDERS: Alejandro Bedoya (Philadelphia Union), Michael Bradley (Toronto FC), Benny Feilhaber (Sporting Kansas City), Jermaine Jones (Unattached), Sacha Kljestan (New York Red Bulls), Sebastian Lletget (LA Galaxy), Dax McCarty (New York Red Bulls), Darlington Nagbe (Portland Timbers), Chris Pontius (Philadelphia Union), Wil Trapp (Columbus Crew SC)

FORWARDS: Juan Agudelo (New England Revolution), Jozy Altidore (Toronto FC), Jordan Morris (Seattle Sounders FC), Chris Wondolowski (San Jose Earthquakes), Gyasi Zardes (LA Galaxy)