in a third baseman's winning season, with .476 in 1988; Chipper Jones' National League record is .441, achieved in 1999. Brett also holds the record for highest slugging percentage (.664 in 1980), followed by National League record-holder Schmidt (.644 in 1981). Schmidt's 48 home runs are tied with Adrián Beltré for most in the National League during an award-winning season. Despite this, Rodriguez holds the Major League record, with 54 home runs in 2007. Rodriguez batted in 156 runs during the 2007 season; the National League record is held by Castilla (144 runs batted in during 1998). Key American League winners National League winners References Inline citations External links Louisville Slugger - The Silver Slugger Award Silver Slugger Award Awards established in 1980