Toronto Blue Jays Losses Leaders

Career totals with the Blue Jays and the best single seasons in club history. Records run through the 2025 season.

Jim Clancy holds the Blue Jays career record with 140 losses. The single-season record is 18, by Jerry Garvin in 1977.

All-time Blue Jays leaders

Career totals with the club

#	Player	With the club	L	G
1	Jim Clancy	1977–1988	140	352
2	Dave Stieb	1979–1998	134	439
3	Pat Hentgen	1991–2004	85	270
4	Jimmy Key	1984–1992	81	317
5	Roy Halladay	1998–2009	76	313
6	Todd Stottlemyre	1988–1994	70	206
7	Juan Guzman	1991–1998	62	195
8	Luis Leal	1980–1985	58	165
9	Jesse Jefferson	1977–1980	56	127
10	Kelvim Escobar	1997–2003	55	301
10	David Wells	1987–2000	55	306
12	R. A. Dickey	2013–2016	52	131
13	Kevin Gausman	2022–2026	51	148
14	Chris Carpenter	1997–2002	50	152
15	Dave Lemanczyk	1977–1980	45	95
15	Ricky Romero	2009–2013	45	129
15	Marcus Stroman	2014–2019	45	135
18	Brett Cecil	2009–2016	42	330
18	Josh Towers	2003–2007	42	108
20	Jerry Garvin	1977–1982	41	196
20	J. A. Happ	2012–2018	41	135
22	Marco Estrada	2015–2018	40	124
23	Jose Berrios	2021–2025	39	139
24	John Cerutti	1985–1990	37	191
25	Duane Ward	1986–1995	36	452

Best seasons in club history

#	Player	Season	L	G
1	Jerry Garvin	1977	18	34
1	Phil Huffman	1979	18	31
3	Erik Hanson	1996	17	35
3	Jesse Jefferson	1977	17	33
3	Todd Stottlemyre	1990	17	33
6	Jim Clancy	1980	16	34
6	Jesse Jefferson	1978	16	31
6	Dave Lemanczyk	1977	16	34
6	Tom Underwood	1979	16	33
10	Jim Clancy	1984	15	36
10	R. A. Dickey	2016	15	30
10	Kelvim Escobar	2000	15	43
10	Luis Leal	1982	15	38
10	Cory Lidle	2003	15	31
10	Dave Stieb	1980	15	34
16	Henderson Alvarez	2012	14	31
16	Chris Bassitt	2024	14	31
16	Jim Clancy	1986	14	34
16	Jim Clancy	1982	14	40
16	Marco Estrada	2018	14	28
16	Jim Gott	1983	14	34
16	Juan Guzman	1995	14	24
16	Pat Hentgen	1995	14	30
16	Jimmy Key	1989	14	33
16	Dave Lemanczyk	1978	14	29