The 1895 Phillies put up 22.1 WAR between 3 starters, all of whom are Hall of Famers, and backup Tuck Turner. He had the lowest batting average of the group at .386.
The three starters Sam Thompson, Billy Hamilton, and Ed Delahanty, were all top 5 in WAR, scored 446 runs, and stole 170 bases.
That's truly outrageous, even for the era.