Featherweight Kamil Laszczyk and junior middleweight Patryk Szymanski, a pair of Polish fighters, are the most recent additions to have signed with powerful advisor Al Haymon, according to Haymon associate Sam Watson.

Laszczyk (17-0, 7 knockouts), 23, was last in action for a unanimous decision victory over Tuomo Eronen in May and Szymanski (11-0, 6 KOs), 21, registered his fourth straight stoppage in May in the sixth round against Andrei Abramenka.

Laszczyk is scheduled to face Sergio Romero (7-3-3) on Oct. 17 in Dzierzoniow, Poland, according to Watson.

Haymon also recently added Mexican junior featherweight Jorge Lara, as well as Puerto Rican super middleweight Jonathan Gonzalez.

Promoted by Sampson Lewkowicz, Lara, 23, has scored knockouts in five of his past six fights and was last in action for a majority decision over Jairo Hernandez in January.

Lara will face an opponent to be determined in support of the Oct. 11 main event featuring IBF junior middleweight titleholder Carlos Molina against former beltholder Cornelius Bundrage in Cancun, Mex.

Gonzalez is coming off a split decision in May over Rogelio Medina, whose following fight was last month’s third round knockout of previously undefeated J’Leon Love.

“We’re excited to be working with the four of them,” said Watson. “All of them have very bright futures with us.”

In aligning with Haymon, the foursome follows signings made earlier this year by RING light heavyweight champion Adonis Stevenson, IBF junior lightweight titleholder Rances Barthelemy, IBF 140-pound titleholder Lamont Peterson, WBO bantamweight titleholder Tomoki Kameda, three-division titlewinner Abner Mares and lightweight Anthony Peterson.

Others already in Haymon’s stable include Floyd Mayweather Jr., Danny Garcia, Adrien Broner, Marcos Maidana, Lucas Matthysse and Erislandy Lara.