mlb didn't have a reasonable testing policy until 2005, and not until canseco and congress did it have a high profile. they were all relatively in the "clear" until then.
bonds career:
Code:
Year AB/HR
1986 25.8
1987 22.0
1988 22.4
1989 30.5
1990 15.7
1991 20.4
1992 13.9
1993 11.7
1994 10.6
1995 15.3
1996 12.3
1997 13.3
1998 14.9
1999 10.4
2000 9.8
2001 6.5
2002 8.8
2003 8.7
2004 8.3
2005 8.4
2006 14.1
2007 11.7