The veteran defender was unhappy with the timing of the move.
Carragher said: "I'd have loved him [Torres] to stay and I wish he would have given us to the end of the season.
"For two or three years for us he's been the best striker in the world.
"The disappointing thing is the timing of it but the start of the season hasn't gone well.
"I think it was something we were expecting either now or maybe in the summer.
"It's happened, good luck to him there and I'm pleased with who we've brought in. We've got to look to the future."