1999 MLB Losses by Team

The Florida Marlins led all of MLB in losses in 1999, with 98, 1 ahead of the Kansas City Royals. The average across 30 MLB teams is 80.9.

Led all of MLB in 1999 Florida Marlins 162 games

98 Losses 1 clear of Kansas City Royals

#	Team	League	G	L
1	Florida Marlins	NL	162	98
2	Kansas City Royals	AL	161	97
2	Minnesota Twins	AL	161	97
4	Chicago Cubs	NL	162	95
5	Montreal Expos	NL	162	94
6	Tampa Bay Devil Rays	AL	162	93
7	Anaheim Angels	AL	162	92
7	Detroit Tigers	AL	161	92
9	Colorado Rockies	NL	162	90
10	San Diego Padres	NL	162	88
11	Milwaukee Brewers	NL	161	87
12	Chicago White Sox	AL	162	86
12	St. Louis Cardinals	NL	161	86
14	Los Angeles Dodgers	NL	162	85
14	Philadelphia Phillies	NL	162	85
16	Baltimore Orioles	AL	162	84
17	Pittsburgh Pirates	NL	161	83
17	Seattle Mariners	AL	162	83
	MLB average			80.9
19	Toronto Blue Jays	AL	162	78
20	San Francisco Giants	NL	162	76
21	Oakland Athletics	AL	162	75
22	Boston Red Sox	AL	162	68
23	Cincinnati Reds	NL	163	67
23	Texas Rangers	AL	162	67
25	New York Mets	NL	163	66
26	Cleveland Indians	AL	162	65
26	Houston Astros	NL	162	65
28	New York Yankees	AL	162	64
29	Arizona Diamondbacks	NL	162	62
30	Atlanta Braves	NL	162	59

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.