Losman's agent, Gary Wichard, told The Associated Press on Friday that his client would prefer to be traded, but added Losman would play out the final year of his contract if necessary. Wichard said he has not yet spoken to the Bills because the team is seeking a new general manager after Marv Levy stepped down earlier this week.
Whether the Bills choose to keep Losman, Wichard said he didn't see any chance of Losman remaining with the team after next season.
"That ship has sailed, my friend," Wichard said. "Hopefully, they do something this year. And if not, we'll just walk away after next year."
Wichard said he spoke out now because he knew how unhappy his client is. He said he and Losman didn't want to air their views during the season so not to cause a distraction to the team.
Losman declined numerous interview requests over the final weeks of the season, and also after Bills players cleaned out their lockers Monday after a 7-9 finish, in which Buffalo missed the playoffs for a franchise record eighth consecutive season.
"I give him credit for handling this thing the way he has," Wichard said. "But at the end, he said, 'I'm out of here.'"
The Bills were not immediately available for comment.
Bills owner Ralph Wilson has previously said the team has not made a decision on Losman's future, and didn't rule out the possibility of the player returning for one more year.
Noting the number of starters hurt this season, Wilson told The AP last month that it might be important for the Bills to keep two experienced players.
The Bills, however, are high on Edwards, the third-round draft pick out of Stanford, who is expected to return as the starter despite an up-and-down season.
Edwards went 2-3 to finish the year after reclaiming the starting job for a second time from Losman. Edwards took over the first time in Week 3 after Losman sprained his knee during the first series of a 38-7 loss at New England.
Losman reclaimed the starting job after Edwards sprained his throwing hand five weeks later in a 13-3 win at the New York Jets. Losman, who rallied the Bills to beat the Jets, went 2-2 in his next four starts before losing the job again.
Wichard said Losman was unhappy by the lack of support the team provided him.
"He knows they bailed on him," Wichard said. "Nobody would ever say, 'J.P., you're our quarterback.' They said it was a week-to-week job. He was waiting to be yanked. And that's what eventually happened."