Swans rookie Lloyd Perris has suffered yet another setback, innocuously rupturing his anterior cruciate ligament during a training drill last week.

Perris, who has had two rounds of reconstructive surgery, injured his good knee during a training drill ahead of last weekend’s clash against the Giants.

General Manager of Football Tom Harley said the injury was heartbreaking for the 20-year-old who has spent more time rehabilitating than out on the park since arriving at the Swans via Pick 55 in the 2013 Rookie Draft.

“He’s had a wretched run since he started his rookie-listed career at the Swans and as a result his season has finished,” Harley confirmed for the Round 22 HCF Injury Update.

“It was just one of those training mishaps and was Lloyd’s good knee. He’s had some ACL reconstructions on his other knee so it’s devastating for him.”

Perris underwent LARS surgery on Monday, a technique using synthetic ligaments, and is set for another extended stint on the sidelines.

On a brighter note, LARS has a shorter recovery time than the traditional reconstructive method.

“He’s an amazingly optimistic young man,” Harley said.

“He’s a fantastic clubman and a really popular boy amongst the group and we wish him all the best in his recovery.”

Perris managed five NEAFL games this season after enduring a number of setbacks since his last reconstruction midway through last season.