Pacquiao rebuffs talk of possibly facing Canelo

Manny Pacquiao?s win against Jessie Vargas on Saturday for a welterweight title opened the door to a number of big-fight possibilities. Mayweather? Thurman? Garcia? But facing Canelo Alvarez, who currently holds a 154-pound title, seems to be a task too big, Pacquiao has acknowledged. While the merger of Pacquiao and Canelo would be a potential PPV bonanza because of the popularity of the two fighters, Pacquiao expressed caution because of the size difference. ?I do not know (if that could be po…