David Haye and Jeff Lacy prove that lifting weights is bad for a boxer

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Being overly muscled can be bad. However I don't think Haye or Lacy have that terrible stamina, although Lacy is a bit ponderous.

I could be wrong but didn't Lacy claim he never lifted weights? I don't believe it myself though, just looking at him.

Many boxers lift weights, but it shouldn't be the major part of your training. See Shannon Briggs...

there are people that have seen jeff lifting plenty and heavy weights, so good thing you dont believe cuz it aint true