Notable Fighters Who Lost Their Pro Debut
Active Fighters:
Robert Allen (TKO4)
William Abelyan (PTS 4, lost his first two fights)
In-Jin Chi (PTS 4)
Antwun Echols (KO 1)
Kirino Garcia (TKO 3, lost his first eighteen fights! He is 33-5-1 ever since)
Maurice Harris (PTS 4)
Bernard Hopkins (PTS 4)
Juan Manuel Marquez (DQ 1)
Ricardo Mayorga (TKO 6, the guy he lost to (Humberto Aranda) would eventually challenge for the WBC Light Middleweight Title)
Rafael Marquez (KO 8, fought former world champion Victor Rabanales)
Johnny Nelson (PTS 6, lost his first three fights)
Orlando Salido (TKO 4)
Retired Fighters:
Alexis Arguello (KO 1)
Henry Armstrong (KO 3)
Miguel Canto (TKO 3)
Billy Conn (PTS 4)
Ted "Kid" Lewis (PTS 6)
Benny Leonard (KO 3)
Manuel Ortiz (PTS 4, lost to Benny Goldberg. Ortiz and Goldberg fought each other four times in total, with both men winning two of those fights. Their final fight was for the World Bantamweight title, in which Ortiz was the victor.)
Freddie Pendleton (PTS 4)
James "Bonecrusher" Smith (TKO 4)
Mike Weaver (KO 3, lost his pro debut and his second pro fight to Howard Smith)