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Jordan Morris is considered a key forward for the U.S. Getty

Seattle Sounders and U.S. men's national team striker Jordan Morris is expected to be sidelined for up to nine months after tearing his anterior cruciate ligament (ACL), according to reports.

The 23-year-old was injured Thursday in a CONCACAF Champions League match against Santa Tecla in El Salvador. Morris went down late in the second half after making a run on the artificial turf.

The Seattle Sounders won't comment on the injury until Monday, according to the Seattle Times.

Morris is coming off a torn hamstring in September that sidelined him for three months. On Feb. 2, the Seattle native posted on Twitter that he was "pumped to be back" with the Sounders.

Among the best forwards in MLS, Morris has scored 15 goals in 57 appearances for the Sounders, while scoring five goals in 25 games for the U.S. team.

The Sounders begin their 2018 MLS season at home Sunday against Los Angeles FC.

The U.S. team failed to qualify for the 2018 World Cup in Russia. The Yanks have upcoming friendlies against Paraguay (March 27), Ireland (June 2) and France (June 9).

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Roberto Domingez (L) of Santa Tecla FC fights for the ball with Jordan Morris of the Seattle Sounders during the CONCACAF Champions League football match between Salvadorean team Santa Tecla and Seattle Sounders of the US in Santa Tecla. Getty