I used the Play Index .
I did some poking around at the invaluable Baseball Reference site to see how some notable catchers were eased into the big leagues by playing around 50 games at age 21 or 22 .
Using the Play Index , I did some poking around at the invaluable Baseball Reference site to see how some notable catchers were eased into the big leagues by playing around 50 games at age 21 or 22 .