For a long time it was thought that Young Otto held the record for most 1st round KO's in a career. During my research I've seen his KO record at 40, 38 & 35.
However there is a boxer by the name of Peter Maher who is actually the all time record holder for most 1st round KO's in a career with 50.
In modern times believe it or not Shannon Briggs hold's the distinction of having 33 1st round KO's in his career. Scoring his 33rd just this past weekend and edging closer to Otto.
People often ask who has the most consecutive 1st round KO's from the begingin of a career. First it was Edwin Valero then Tyron Brunson broke his record sadly this record now belongs to a sorry, poor excuse of a boxer namaed Ali Raymi from Yemen who has 20 1st round KO's consecutively. If you look him up and see his fights you will quickly discover the poor excuse of boxing commission that country has. His record, his opponents and the commission allowing this should be ashamed.