My WAR calculation is a combination of Baseball-reference and Clay Davenport; I believe it to be the "best" WAR number available for historical comparison. 8 WAR is an MVP quality season. The record is pythagorean adjusted for 162 games.
1913 101-51 NL Pennant (lost to A’s 4 games to 1)
C Chief Meyers 4.8
1B Fred Merkle .3
2B Larry Doyle 2.3
SS Art Fletcher 5.15
3B Buck Herzog 1.65
LF George Burns 2.6
CF Fred Snodgrass 1.85
RF Red Murray .95
Uti Tillie Shafer 2.4
SP Christy Mathewson 7
SP Rube Marquard 4.95
SP Jeff Tesreau 5.2
SP Al Demaree 2.95
RP Doc Crandall 1.05
RP Art Fromme -.25-Third straight pennant, third straight hundred + pythag win season, third straight WS loss. Hey, look. It's Jim Thorpe.