Did you just learn where the exclamation point key is on your keyboard?
Allen Iverson was listed at 6'1 his whole career. He's about 5'9-5'10.
CC Sabathia is listed at 290lbs. He's routinely said that he's over 315lbs (losing weight currently).
Unless you are standing next to the guy with a tape measure what you are reading is as good as valid as a blind guy's assessment of their height.