2001 MLB Winning Percentage by Team

The Seattle Mariners led all of MLB in winning percentage in 2001, with .716, .086 ahead of the Oakland Athletics. The average across 30 MLB teams is .500.

Led all of MLB in 2001 Seattle Mariners 162 games

.716 Winning Percentage .086 clear of Oakland Athletics

#	Team	League	G	W-L%
1	Seattle Mariners	AL	162	.716
2	Oakland Athletics	AL	162	.630
3	New York Yankees	AL	161	.594
4	Houston Astros	NL	162	.574
4	St. Louis Cardinals	NL	162	.574
6	Arizona Diamondbacks	NL	162	.568
7	Cleveland Indians	AL	162	.562
8	San Francisco Giants	NL	162	.556
9	Atlanta Braves	NL	162	.543
9	Chicago Cubs	NL	162	.543
11	Los Angeles Dodgers	NL	162	.531
11	Philadelphia Phillies	NL	162	.531
13	Minnesota Twins	AL	162	.525
14	Chicago White Sox	AL	162	.512
15	Boston Red Sox	AL	161	.509
16	New York Mets	NL	162	.506
	MLB average			.500
17	Toronto Blue Jays	AL	162	.494
18	San Diego Padres	NL	162	.488
19	Florida Marlins	NL	162	.469
20	Anaheim Angels	AL	162	.463
21	Colorado Rockies	NL	162	.451
21	Texas Rangers	AL	162	.451
23	Milwaukee Brewers	NL	162	.420
23	Montreal Expos	NL	162	.420
25	Cincinnati Reds	NL	162	.407
25	Detroit Tigers	AL	162	.407
27	Kansas City Royals	AL	162	.401
28	Baltimore Orioles	AL	162	.391
29	Pittsburgh Pirates	NL	162	.383
29	Tampa Bay Devil Rays	AL	162	.383

A team's total is its players' numbers for the club added up, so a player traded mid-season counts for each team only what he did there. Rates such as ERA and batting average are worked out from the team's summed totals, not averaged across players.