Yea, of the 1950s...60 years ago. I tend to hold the legends from the 70s and earlier with a grain of salt, in most sports, because obviously sports are way different now. The old legends were great relative to their compe ion i.e. their era and environment. The great players of today (Messi, Iniesta, Lebron, etc) are great in absolute terms..the raw player. Obviously they grew up in a totally different environment which makes this so, but I'm more drawn to the best raw players, not the best relative to their era. Place Di Stefano into a current game between Barca and Madrid and he's likely not going to stand out much, despite being an undisputed top 5 player in history. Place Messi into the opposite situation and he scores 10 goals in 1 game. Obviously in such a scenario, it's taking a player made in the 40s and 50s and placing into current sports environment and it's an unfair comparison, but you can't say for sure that a great player from 60 years ago would necessarily flourish had he the advantages of the current sports industry.
I respect the old legends and like many of them, but in most sports the greats from half a century ago did not produce the same thing the current greats produce, it's not the same playing level. Bill Russell won 11 rings in 13 years as one of the most dominant centers in the game, yet he would be dominated by Lebron James in any way you want to compare the two. They're nearly the same height (Russell between 1-2 inches taller), James is probably 30 lbs heavier, stronger, faster and quicker. And can jump like crazy. And can basically do everything on the basketball court. They obviously play different positions and roles, but that's how good of a playing level James is on; he could dominate as a center in the 50s when it's not his natural position, while being likely the greatest SF ever when it's all said and done (clearly he is, it's just a matter of time before he retires and most people start appreciating what he does as a player).