Sampson Lewkowicz

Sampson Lewkowicz (born January 10, 1951, in Montevideo) is an Uruguayan-American boxing promoter and manager, whose notable clients have included Sergio Martinez, Magomed Abdusalamov, Javier Fortuna, and Gabriel Campillo. Lewkowicz is also credited for having discovered Manny Pacquiao prior to the Filipino fighter's arrival in the United States, and served as matchmaker for Sultan Ibragimov.

Lewkowicz is the president of Sampson Boxing, a promotional and advising company for boxers. Lewkowicz has gained notable recognition for his role as chief adviser to multi-division world champion Sergio Martinez.

Lewkowicz was also involved in helping create a trust for boxer Magomed Abdusalamov after the boxer collapsed following his fight with Mike Perez.

Lewkowicz is also the promoter of two-time super middleweight titlist, David Benavidez,

Lewkowicz also manages unified Junior Middleweight world champion, Jeison Rosario. Rosario knocked out Julian Williams in 2019 to win the championship.