He had the opportunity to challenge for the vacant IBF mini flyweight world title against Thai boxer Samuth Sithnaruepol on March 24, 1988, at Rajadamnern Stadium, Bangkok.

[2] Undefeated Lucas, who wore navy blue trunks with white diagonal bar, fought well and can punch the right fist to the opponent's chin until staggers in the first round.

[2] Two years later, he returned to Thailand to challenge the world title in the same weight class and same organization with the new champion Fahlan Lukmingkwan on December 20, 1990, Lucas's 24th birthday.

On March 16, 1992, Lucas had the opportunity to challenge the world title for the third time with Ricardo López the unbeaten Mexican champion in Mexico City.

His last bout took place on February 20, 1995, in Tokyo, Japan when losing by technical knockout in the 10th round to Chang Jae Kwon from South Korea.