Claim: Before retiring in 1998, Calvin Grove (born August 5, 1962 in Coatesville, Pennsylvania) challenged WBC super featherweight title holder Kostya Tszyu in 1992, and later moved up to take on WBC lightweight title holder Miguel Ángel González, but lost via TKO.
Evidence: Grove retired in 1998 after losing via 1st-round KO to Kostya Tszyu. Grove later moved up in weight and in 1992 challenged WBC super featherweight title holder Azumah Nelson, but lost a decision.