This one. Another cliche is "He never reached his potential" or "he's inconsistent". More like not as talented as you think.
"Kobe's a top 3 player in the NBA." "Red Sox don't have tainted and cheap world championships." "Pau Gasol is not the best player on the Lakers this season." "Titles in the 1960's mean as much as the Lakers' titles in the modern era." Best franchise = Lakers. It still bothers me that the NBA was not as integrated and athletic in the past, so I don't think as highly of the Celtics.
"It's not who starts the game, it's who finishes the game." Just heard this from Antonio Harvey on the pregame. I hate that cliche.