Jeison Manuel Rosario Bastardo (; born 7 April 1995) is a Dominican professional boxer who held the unified WBA (Super) and IBF light middleweight titles in 2020.
Rosario compiled a record of 19âÂÂ1âÂÂ1 before facing and defeating Julian Williams to win the WBA (Super), IBF, and IBO light middleweight titles.
In his next bout, Rosario faced Jermell Charlo for the WBC and vacant The Ring super welterweight championship. Rosario was knocked down by Charlo with a left jab in the eight round and was unable to get up, earning Charlo the KO victory.
In his next fight, Rosario faced Erickson Lubin, who was ranked #1 by the WBC and #6 by The Ring at super-welterweight. Lubin won the fight by KO after dropping Rosario twice in the sixth round.
Rosario faced Jesus Ramos in a 10-round super welterweight bout at T-Mobile Arena in Las Vegas on February 1, 2025. He lost by technical knockout in the eighth round.
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