Melbourne forward Christian Welch will miss the remainder of the Storm's 2017 campaign after he ruptured his Anterior Cruciate Ligament in his left knee on Sunday.
The incident happened minutes before the half-time whistle of the Storm's 34-22 win over the Dragons on Sunday.
Welch had scans on Monday morning, and they revealed the 22-year-old will need to undergo a full reconstruction.
“We are extremely disappointed for Christian after he had made such a terrific start to the season,” Storm Football Director Frank Ponissi told the club's website.
“The Club will support him through this recovery and we are certain that with his level of work ethic, he will leave no stone unturned during his rehab.
“We have no doubt that Christian will continue to support the boys throughout the 2017 season and we look forward to seeing him back on the field and playing good footy for Melbourne in 2018 and beyond.”