The Red Sox may use left-hander Felix Doubront in a trade to bring a difference-maker for Boston. One rival general manager says of Doubront: "It's guaranteed he's traded by next July 31, and probably this offseason." A second adds: "They would part with him in a heartbeat to upgrade." Boston general manager Theo Epstein predictably denied the rumors. "That report couldn't be further from the truth," Epstein said. "We value Felix tremendously. He has a definite future. We see him as a starter long-term, and he could impact our bullpen or rotation in 2011."