For those who care, I managed to help Dave Smith over at retrosheet.org get the redirects working for the player pages.

Old links used to look like this:

http://retrosheet.org/boxesetc/Pkoufs101.htm
http://retrosheet.org/boxesetc/Pmaddg002.htm
http://retrosheet.org/boxesetc/Pmurtm001.htm

and now they look like this:

http://retrosheet.org/boxesetc/K/Pkoufs101.htm
http://retrosheet.org/boxesetc/M/Pmaddg002.htm
http://retrosheet.org/boxesetc/M/Pmurtm001.htm

An interesting thing I learned - there are no players, managers, or umpires to ever have a last name that started with X. Every other letter is represented, however.