2021 MLB Losses by Team

The Arizona Diamondbacks and the Baltimore Orioles shared the lead of all of MLB in losses in 2021, with 110. The average across 30 MLB teams is 81.0.

Led all of MLB in 2021 Arizona Diamondbacks 162 games

110 Losses Tied with Baltimore Orioles

#	Team	League	G	L
1	Arizona Diamondbacks	NL	162	110
1	Baltimore Orioles	AL	162	110
3	Texas Rangers	AL	162	102
4	Pittsburgh Pirates	NL	162	101
5	Washington Nationals	NL	162	97
6	Miami Marlins	NL	162	95
7	Chicago Cubs	NL	162	91
8	Minnesota Twins	AL	162	89
9	Kansas City Royals	AL	162	88
10	Colorado Rockies	NL	161	87
11	Detroit Tigers	AL	162	85
11	Los Angeles Angels of Anaheim	AL	162	85
11	New York Mets	NL	162	85
14	San Diego Padres	NL	162	83
15	Cleveland Indians	AL	162	82
	MLB average			81.0
16	Philadelphia Phillies	NL	162	80
17	Cincinnati Reds	NL	162	79
18	Oakland Athletics	AL	162	76
19	Atlanta Braves	NL	161	73
20	Seattle Mariners	AL	162	72
20	St. Louis Cardinals	NL	162	72
22	Toronto Blue Jays	AL	162	71
23	Boston Red Sox	AL	162	70
23	New York Yankees	AL	162	70
25	Chicago White Sox	AL	162	69
26	Houston Astros	AL	162	67
26	Milwaukee Brewers	NL	162	67
28	Tampa Bay Rays	AL	162	62
29	Los Angeles Dodgers	NL	162	56
30	San Francisco Giants	NL	162	55

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.