Brooks Lennon returned to Atlanta United’s training facility because of an ankle injury suffered while with the U.S. men’s national team.

The severity of the injury hasn’t been determined. U.S. manager Gregg Berhalter announced Lennon’s departure from its camp Saturday.

Lennon, a fullback, wasn’t included on the game-day roster for the team’s 1-0 win against El Salvador on Thursday in Columbus, Ohio.

Lennon is expected to be Atlanta United’s starter on the right side for its season-opening MLS game against Sporting KC on Feb. 27 at Mercedes-Benz Stadium.

Lennon, 24, made 32 appearances, including 30 starts, for Atlanta United last season. He had six assists.

If Lennon is unable to play, Ronald Hernandez is second on the depth chart.

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Atlanta United’s 2022 MLS schedule

Feb. 27 vs. Sporting KC, 3 p.m., FS1

March 5 at Colorado, 6 p.m., BSSO/BSSE

March 13 vs. Charlotte, 4:30 p.m., FS1

March 19 vs. Montreal, 4 p.m., BSSO/BSSE

April 2 at D.C. United, 7:30 p.m., BSSO/BSSE

April 9 at Charlotte, 3 p.m., ESPN

April 16 vs. Cincinnati, 6 p.m., BSSO/BSSE

April 24 at Miami, 1 p.m., ESPN

April 30 at Montreal, 4 p.m., BSSO/BSSE

May 7 vs. Chicago, 6 p.m., BSSO/BSSE

May 15 vs. New England, 2 p.m., ESPN

May 21 at Nashville, 7:30 p.m. FOX

May 28 vs. Columbus Crew, 7 p.m., BSSO/BSSE

June 19 vs Miami, 4 p.m., ESPN2

June 25 at Toronto, 7:30 p.m., BSSO/BSSE

June 30 at New York Red Bulls, 8 p.m., BSSO/BSSE

July 3 at NYCFC, 5 p.m., BSSO/BSSE

July 9 vs. Austin, 7 p.m., BSSO/BSSE

July 13 vs. Real Salt Lake, 7:30 p.m., BSSO/BSSE

July 17 vs. Orlando, 3 p.m., ABC

July 24 at L.A. Galaxy, 9:30 p.m., FS1

July 30 at Chicago, 5 p.m., BSSO/BSSE

August 6 vs. Seattle, 3 p.m., ABC

August 13 at Cincinnati, 7:30 p.m. BSSO/BSSE

August 17 vs. New York Red Bulls, 7:30 p.m., BSSO/BSSE

August 21 at Columbus, 6 p.m., FS1

August 28 vs. D.C. United, 4 p.m., UNIV

August 31 at Philadelphia, 7:30 p.m.

Sept. 4 at Portland, 5:30 p.m., FOX

Sept. 10 vs. Toronto, 7:30 p.m., BSSO/BSSE

Sept. 14 at Orlando, 6 p.m., BSSO/BSSE

Sept 17 vs. Philadelphia, 3:30 p.m., UniMas

Oct. 1 at New England, 1 p.m., UniMas

Oct. 9 vs. NYCFC, TBD, BSSO/BSSE