2021 MLB Winning Percentage by Team

The San Francisco Giants led all of MLB in winning percentage in 2021, with .661, .007 ahead of the Los Angeles Dodgers. The average across 30 MLB teams is .500.

Led all of MLB in 2021 San Francisco Giants 162 games

.661 Winning Percentage .007 clear of Los Angeles Dodgers

#	Team	League	G	W-L%
1	San Francisco Giants	NL	162	.661
2	Los Angeles Dodgers	NL	162	.654
3	Tampa Bay Rays	AL	162	.617
4	Houston Astros	AL	162	.586
4	Milwaukee Brewers	NL	162	.586
6	Chicago White Sox	AL	162	.574
7	Boston Red Sox	AL	162	.568
7	New York Yankees	AL	162	.568
9	Toronto Blue Jays	AL	162	.562
10	Seattle Mariners	AL	162	.556
10	St. Louis Cardinals	NL	162	.556
12	Atlanta Braves	NL	161	.547
13	Oakland Athletics	AL	162	.531
14	Cincinnati Reds	NL	162	.512
15	Philadelphia Phillies	NL	162	.506
	MLB average			.500
16	Cleveland Indians	AL	162	.494
17	San Diego Padres	NL	162	.488
18	Detroit Tigers	AL	162	.475
18	Los Angeles Angels of Anaheim	AL	162	.475
18	New York Mets	NL	162	.475
21	Colorado Rockies	NL	161	.460
22	Kansas City Royals	AL	162	.457
23	Minnesota Twins	AL	162	.451
24	Chicago Cubs	NL	162	.438
25	Miami Marlins	NL	162	.414
26	Washington Nationals	NL	162	.401
27	Pittsburgh Pirates	NL	162	.377
28	Texas Rangers	AL	162	.370
29	Arizona Diamondbacks	NL	162	.321
29	Baltimore Orioles	AL	162	.321

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.