Here's the top 50 as of the end of 2005: SEATTLE MARINERS SEASON HOMERUNS YEAR HR T1 Ken Griffey Jr. 1998 56 T1 Ken Griffey Jr. 1997 56 3 Ken Griffey Jr. 1996 49 4 Ken Griffey Jr. 1999 48 5 Ken Griffey Jr. 1993 45 6 Jay Buhner 1996 44 T7 Alex Rodriguez 1998 42 T7 Alex Rodriguez 1999 42 9 Alex Rodriguez 2000 41 T10 Jay Buhner 1995 40 T10 Jay Buhner 1997 40 T10 Ken Griffey Jr. 1994 40 13 Richie Sexson 2005 39 T14 Edgar Martinez 2000 37 T14 Bret Boone 2001 37 16 Alex Rodriguez 1996 36 17 Bret Boone 2003 35 18 Gorman Thomas 1985 32 T19 Paul Sorrento 1997 31 T19 Tino Martinez 1995 31 T21 Edgar Martinez 1998 29 T21 Edgar Martinez 1995 29 T21 Willie Horton 1979 29 T21 Alvin Davis 1987 29 T25 Jim Presley 1985 28 T25 Edgar Martinez 1997 28 T27 Jim Presley 1986 27 T27 Lee Stanton 1977 27 T27 Ken Griffey Jr. 1992 27 T27 Jay Buhner 1993 27 T27 Jay Buhner 1991 27 T27 Alvin Davis 1984 27 T27 Ken Phelps 1987 27 T34 Edgar Martinez 1996 26 T34 Phil Bradley 1985 26 T34 Jay Buhner 2000 26 T37 Danny Tartabull 1986 25 T37 Jay Buhner 1992 25 T37 Mike Cameron 2001 25 T37 Mike Cameron 2002 25 T41 Bret Boone 2002 24 T41 Bret Boone 2004 24 T41 Edgar Martinez 2003 24 T41 Edgar Martinez 1999 24 T41 Ruppert Jones 1977 24 T41 Jim Presley 1987 24 T41 Ken Phelps 1986 24 T41 Ken Phelps 1984 24 T41 Jeffrey Leonard 1989 24 T50 Paul Sorrento 1996 23 T50 Alex Rodriguez 1997 23 T50 Edgar Martinez 2001 23 T50 Mike Blowers 1995 23