As the number of unbeaten teams in major college football was whittled to six, Clemson emerged as the best bet to reach the playoff, even though the Tigers don’t appear to be a serious threat to win a national championship. The Tigers (8-0) head into the last month of the season a virtual lock to return the Atlantic Coast Conference title game after rallying for a sloppy 27-21 victory Saturday against No. 14 Syracuse.