Progressive Slugging Pct
Leaderboard
 
This table is a snapshot of the career, single-season, active, and yearly leaders at the end of each season.
* - Indicates Hall of Fame
+ - indicates hit-less at-bats added to meet 502PA requirement.
Bold - Indicates active player
Year    Career SLG    Single-Season SLG    Active SLG    Yearly SLG 
1973      Walter Browne .6073      Walter Browne .6073 
1974      Joe Gillstrom * .6229      Joe Gillstrom * .6229 
1975      Vince Milani .6905      Vince Milani .6905 
1976      Vince Milani .6905      Luther Overson .5682 
1977    Elroy Futon * .5294    Vince Milani .6905    Elroy Futon * .5294    Robert Roten .6184 
1978    Vince Milani .5617    Vince Milani .6905    Vince Milani .5617    Rube Baker .5854 
1979    Vince Milani .5748    Vince Milani .6905    Vince Milani .5748    Vince Milani .6599 
1980    Vince Milani .5767    Vince Milani .6905    Vince Milani .5767    Oswaldo Gaona .5766 
1981    Vince Milani .5593    Vince Milani .6905    Vince Milani .5593    Randy Spratt .5678 
1982    Vince Milani .5590    Vince Milani .6905    Vince Milani .5590    John Bockus .6075 
1983    Vince Milani .5581    Vince Milani .6905    Vince Milani .5581    Jason Bilford .6055 
1984    Vince Milani .5581    Vince Milani .6905    Bombo Vadabonceour * .5199    Randy Spratt .6398 
1985    Vince Milani .5581    Vince Milani .6905    Randy Spratt .5224    Long Chamberlain .6667 
1986    Sawyer Silk .5772    Long Chamberlain .7864    Sawyer Silk .5772    Long Chamberlain .7864 
1987    Long Chamberlain .6669    Long Chamberlain .7864    Long Chamberlain .6669    Sawyer Silk .7268 
1988    Long Chamberlain .6358    Long Chamberlain .7864    Long Chamberlain .6358    Sawyer Silk .6887 
1989    Long Chamberlain .6245    Long Chamberlain .7864    Long Chamberlain .6245    Steve Collins .6211 
1990    Sawyer Silk .6187    Long Chamberlain .7864    Sawyer Silk .6187    Henry Jones .6564 
1991    Sawyer Silk .6135    Long Chamberlain .7864    Sawyer Silk .6135    Morris Pennebaker .6862 
1992    Sawyer Silk .6071    Long Chamberlain .7864    Sawyer Silk .6071    Morris Pennebaker .6622 
1993    Long Chamberlain .5981    Long Chamberlain .7864    Long Chamberlain .5981    Joe Belinda .6506 
1994    Morris Pennebaker .6066    Long Chamberlain .7864    Morris Pennebaker .6066    Bolt Vanderhugen .6477