Via B-R.com Play Index, spanning multiple seasons or entire careers, from 1901 to 2013, players younger than 30, who played 75%+ of their games at 2B, (requiring PA between 5500 and 6000), sorted by greatest WAR:
Now, just lock down on Knobby and Robby:
Same position, same ages, same amount of games and plate appearances (give or take) and the same WAR (thereabouts). Of course, Chuck was more of a speed player and Cano is more of a power hitter. But, in terms of value, if you believe in WAR, they had the same relative value to their teams from ages 22 to 30, coming to the plate and playing games at about the same rate.
Yes, Knoblauch later got the yips and toast soon thereafter. So, what’s the point?
Other than it’s interesting that these two second basemen had about the same start to their careers, in terms of how much better they were than the average player at their position, there’s nothing else to see here…for now.