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| 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 |
| 2009 | Daryl Ryles | .6739 | Daryl Ryles | .6739 | ||||
| 2010 | Daryl Ryles | .6739 | James Mahaffey | .6217 | ||||
| 2011 | Daryl Ryles | .7271 | Daryl Ryles | .7271 | ||||
| 2012 | Daryl Ryles | .7271 | Daryl Ryles | .6303 | ||||
| 2013 | Daryl Ryles | .6552 | Daryl Ryles | .7271 | Daryl Ryles | .6552 | Daryl Ryles | .6194 |
| 2014 | Daryl Ryles | .6539 | Daryl Ryles | .7271 | Daryl Ryles | .6539 | Daryl Ryles | .6482 |
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