FRISCO (AP/105.3 The Fan) – FC Dallas defender Walker Zimmerman is expected to miss four to six weeks with a ligament strain in his left knee, possibly sidelining him from the CONCACAF Gold Cup in July.

Zimmerman sustained the injury in the first half of Sunday’s 0-0 draw against Houston on Sunday.

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The 24-year-old has made 10 starts for Dallas this season after a career-high 30 last year. He has one assist this season.

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Zimmerman made his U.S. team debut in a 1-0 exhibition win against Jamaica on Feb. 3. U.S. coach Bruce Arena is expected to use a young roster for the Gold Cup, where the Americans open against Panama on July 8.

Zimmerman was left off of Arena’s roster for upcoming qualifying matches against Trinidad & Tobago and Mexico.

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(© Copyright 2017 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)