Coach Dick Vermeil raised the possibility Thursday that quarterback Trent Green may not start for Kansas City on Sunday against the Oakland Raiders. Green was in St. Louis on Wednesday for funeral services for his father and was expected to return the next day and dive into game preparation. But Vermeil said Green also was absent from a practice on Thursday that was scaled-down, anyway, because of the injuries that have hit both the offense and defense. Vermeil declined to address the question when asked if backup Todd Collins might start. ``I'm not going to say,'' he told reporters at his post-practice news conference.