Claim: Before retiring in 1998, Calvin Grove challenged WBC super featherweight title holder Azumah Nelson in 1992, and later moved up to take on WBC lightweight title holder Miguel Ángel González, but lost via TKO.
Evidence: Grove later moved up in weight and in 1992 challenged WBC super featherweight title holder Azumah Nelson, but lost a decision. Grove later moved up in weight again, and in 1994 took on WBC lightweight title holder Miguel Ángel González, but lost via TKO. Grove retired in 1998 after losing via 1st-round KO to Kostya Tszyu.