Morris, 26, was on loan with the Welsh club through the end of the English Championship season, his first stint abroad after five seasons in MLS. He played four Championship games as a sub for Swansea City and started in the Swans' 3-1 loss to Manchester City in the FA Cup.
Morris is set to return to the United States to prepare for surgery with Dr. Bert Mandelbaum in Santa Monica, California. The injury will likely keep him out of action with the U.S. national team in June and July when it plays in the Concacaf Nations League final four and Gold Cup.
The ACL injury is Morris' second. He was injured in a 2018 Concacaf Champions League match in El Salvador and missed the entire MLS season with the Sounders. He returned in 2019 and helped them win their second MLS title. In 2020, he was an MLS Best XI selection for the first time.