Real Salt Lake have been dealt a blow with the injury to Kwame Watson-Siriboe.
The 26-year old defender is expected to be sidelined for six to eight months after undergoing surgery on a torn and ruptured right ACL and torn right meniscus.
Watson-Siriboe, who has made seven MLS starts this season, sustained the injury in the RSL Reserves' scoreless draw at USL Pro side Phoenix FC on Saturday.