Trinity Armstrong Suffers Devastating ACL Tear, Placed on Season-Ending Injury List by San Diego Wave

FolioPitch.com – 22 July 2026 | San Diego announces ACL tear for Trinity Armstrong, as the 18-year-old defender has been placed on the National Women’s Soccer League’s Season-Ending Injury List (SEI List) after suffering a fully ruptured ACL and lateral meniscus in her right knee. The announcement comes just weeks after Armstrong was reactivated from the same list and made her 2026 season debut.

Armstrong, who returned to action on July 4 against Gotham FC, came off the bench in two consecutive matches before the injury struck. She confirmed the setback in a heartfelt social media post, writing, “Two weeks back. Then this. Six months rebuilding my left knee. Two league games in on my right. Fully ruptured ACL and lateral meniscus. Supposedly my strongest leg and third surgery in three years.”

The San Diego announcement of ACL tear for Trinity Armstrong has sent shockwaves through the NWSL, as the young star was considered a key building block for the Wave’s future. Armstrong, who joined the club last season, has made 18 starts in 25 appearances, recording one goal and two assists. Her versatility and maturity beyond her years made her a fan favorite and a crucial part of the backline.

San Diego Sporting Director and General Manager Camille Ashton expressed full organizational support. “Our hearts are with Trinity in this difficult time,” Ashton said in a press release. “She will have the full support from this team and entire organization as she navigates her recovery.”

The San Diego announcement of ACL tear for Trinity Armstrong underscores the brutal physical toll of professional soccer, especially for young players. Armstrong’s injury history is concerning: this marks her third surgery in three years, with previous issues on her left knee. Despite the setback, Armstrong remains determined. In her social media post, she vowed, “When I walk back out onto that pitch, it won’t be just a comeback, it’ll be proof of what’s possible when you refuse to let anything, not even your own body, break your faith in where you’re going.”

The timing of the injury is particularly harsh. Armstrong had worked tirelessly to return from a prior ACL reconstruction on her left knee, only to suffer a similar fate on her right knee after just two league appearances. Her brief return saw her substitute on for Mimi Van Zanten in the 69th minute against Gotham FC and again in the 74th minute versus Angel City FC on July 11.

San Diego announces ACL tear for Trinity Armstrong at a critical juncture in the Wave’s season. The team, currently fighting for playoff positioning, will now have to adjust their defensive plans without one of their most promising young talents. Head coach Casey Stoney will likely rely on veteran defenders to fill the void, but Armstrong’s absence will be felt both on and off the pitch.

Armstrong’s resilience, however, gives hope. At just 18, she has already faced and overcome significant adversity. Her statement reflects a maturity that goes beyond her years, and her determination to return stronger is a testament to her character. The San Diego Wave organization, along with fans across the league, will be rooting for her full recovery.

In the meantime, the focus shifts to rehabilitation and support. Armstrong’s journey back to the pitch will be long, but her spirit remains unbroken. As she wrote, “It won’t be just a comeback, it’ll be proof of what’s possible.” For now, the San Diego announcement of ACL tear for Trinity Armstrong serves as a somber reminder of the fragility of athletic careers and the relentless mental fortitude required to rebuild.