For single seasons, From 1992 to 1993, Played 50% of games at C, (requiring HR≥20 and RBI≥100), sorted by greatest Seasons matching criteria

NOTE on creating Positional Leaderboards

                   From  To   Ages Seasons Link to Individual Seasons
 -----------------+----+----+-----+-------+------------------------------ 
 Darren Daulton    1992 1993 30-31       2 Ind. Seasons                   
 Mike Piazza       1993 1993 24-24       1 Ind. Seasons                   

Seasons/Careers found: 2.

 Photos from the George Grantham Bain Collection at the Library of Congress.