“[Missing the State of Origin game] is one of the reasons he was disappointed,” Longmire said.
“He said that would have been a great thing to be a part of.
“It’s unfortunate for Lance. He was absolutely flying before Christmas. That’s the most training he’s ever done with us, in that period.”
Longmire is confident that Franklin, who previously had the same operation on his other knee, will bounce back from the injury.
Franklin only managed 10 games in 2019 because of hamstring injuries.
“We decided to have an operation [to] get it done now, and that gives him the opportunity to play the majority of the season. That’s what we’re looking forward to,” Longmire said.
“He had the same operation a couple of years ago on his other leg, and it’s been terrific since.
“It’s just one of those things that happens. His other knee is terrific after having that done, so that gives us confidence to go in and do it and know that he’ll bounce back really well.”
Franklin is likely to be unavailable when Sydney start their season against Adelaide on March 21.