James Simpson-Daniel says he will focus his efforts on Gloucester's Premiership campaign after being left out of England's World Cup squad.
It is the second time the 29-year-old has been left disappointed after failing to make the cut for the 2003 squad which went on to lift the trophy.
"I'm now resigned to the fact that's my opportunity gone," wing, Simpson-Daniel, told BBC Gloucester.
"I'll put it to the back of my mind and go all guns blazing for Gloucester."
He added: "But I can't flick a switch, I'm obviously very disappointed. It's my last opportunity to play in a World Cup. It's tough but fortunately I've been there before so I'll just get my head down.
"In 2003 when I was absolutely devastated, I went back there and got people saying commiserations but then ten minutes later they will be bantering with you.
"It helps you as it's not the end of the world. I'm clearly disappointed by I've got a year-old baby boy and going home to my family makes me realise life isn't over."
Joe Worsley, George Chuter, Thomas Waldrom and David Strettle were also released from duty on Monday.
Simpson-Daniel's omission, along with that of Strettle, has increased team-mate Charlie Sharples' chances of making the final 30.
"I'm overjoyed for Charlie, I've known him since he came through the club at a young age and it's really good and exciting for him," added Simpson-Daniel.
"It's tough whenever anyone gets rejected but you still wish them all luck."