In 1884, Dunlap hit .412, and slugged .621, for a 1.069 OPS, good for an 256 adjusted OPS+ ranking. That ranks second only to Barry Bonds’ 3 best seasons in MLB history, and is sandwiched between Bonds’ 3 seasons and 3 Babe Ruth seasons. Dunlap hit 13 homers, 8 triples, and 39 doubles, in just 101 games: he scored 160 runs, or 1.6 per game.
Why is he so little known? He’s not in the Hall of Fame, he played in the 1880s for the most part, and his 1884 season was for the St. Louis Maroons of the Union Association. And, he did not hit better than .326, or a .452 slugging percentage, in any other season.