Featuring on another huge bill, Redkach made sure of victory in the final round after seemingly building his way to a decision win.
The Ukrainian-born southpaw dropped Brock late on as the 30 year-old recorded a 20th career triumph and can look forward to another big test in the future.
Young Mexican-American contender David Benavidez produced a hurtful display as the powerful super-middleweight made it to 17-0 with minimal fuss. The 20 year-old dropped Uzbek Sherali Mamajonov late in the first round with a body-head combination before finishing the fight in the very next round.
Josh Taylor out-classed a rugged opponent in Alfonso Olvera as the Scotsman recorded and eighth career win, this time over eight rounds. The super-lightweight, currently signed with Barry McGuigan, looked a bit too eager at times but used his superior quality to secure a 79-72, 78-73 (twice) victory despite losing a point for a low blow.
Featherweight Leduan Barthelemy pushed to 12-0 with a six-round decision over Jesus Aguinaga, whilst welterweight Herbert Acevedo did similar by taking a points win over Chris Singleton.
Earlier, Jerry Perez made a successful pro debut with a first round knockout of Javier Cepeda, whilst Antonio Santa Cruz carded a decision win over Victor Torres through four rounds at bantamweight.