1999 MLB Winning Percentage by Team

The Atlanta Braves led all of MLB in winning percentage in 1999, with .636, .019 ahead of the Arizona Diamondbacks. The average across 30 MLB teams is .500.

Led all of MLB in 1999 Atlanta Braves 162 games

.636 Winning Percentage .019 clear of Arizona Diamondbacks

#	Team	League	G	W-L%
1	Atlanta Braves	NL	162	.636
2	Arizona Diamondbacks	NL	162	.617
3	New York Yankees	AL	162	.605
4	Cleveland Indians	AL	162	.599
4	Houston Astros	NL	162	.599
6	New York Mets	NL	163	.595
7	Cincinnati Reds	NL	163	.589
8	Texas Rangers	AL	162	.586
9	Boston Red Sox	AL	162	.580
10	Oakland Athletics	AL	162	.537
11	San Francisco Giants	NL	162	.531
12	Toronto Blue Jays	AL	162	.519
	MLB average			.500
13	Seattle Mariners	AL	162	.488
14	Pittsburgh Pirates	NL	161	.485
15	Baltimore Orioles	AL	162	.482
16	Los Angeles Dodgers	NL	162	.475
16	Philadelphia Phillies	NL	162	.475
18	Chicago White Sox	AL	162	.466
18	St. Louis Cardinals	NL	161	.466
20	Milwaukee Brewers	NL	161	.460
21	San Diego Padres	NL	162	.457
22	Colorado Rockies	NL	162	.444
23	Anaheim Angels	AL	162	.432
24	Detroit Tigers	AL	161	.429
25	Tampa Bay Devil Rays	AL	162	.426
26	Montreal Expos	NL	162	.420
27	Chicago Cubs	NL	162	.414
28	Kansas City Royals	AL	161	.398
29	Florida Marlins	NL	162	.395
30	Minnesota Twins	AL	161	.394

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.