Hank Aaron, Major League Baseball's greatest home run hitter, has hit out at San Francisco Giants Barry Bonds.
Bonds' lawyer admitted the 40-year-old may have unwittingly used creams and oils which contained steroids.
Aaron claimed that single-season home run record holder Bonds' chase of his 755 homers mark would be tainted.
He said: "Any way you look at it, it's wrong. Drugs won't help you hit the ball, but they can make you recuperate consistently enough."
Bonds slammed 73 home runs in 2001 and is currently just 55 short of Aaron's record.
" When you reach a certain age, you just don't bounce back as quickly as you think you can "
He has given evidence to the grand jury investigating the Balco steroid distribution case.
The San Francisco Giants slugger said he had no reason to believe creams and oils supplied by his personal trainer and long-time friend Greg Anderson contained steroids.
Former Atlanta Brave Aaron said: "At his age, you have to ask, 'Did he accomplish all of this by rejuvenating his strength from day to day with those substances?'
"I know that when you reach a certain age, you just don't bounce back as quickly as you think you can when you are playing all of those games."