On the 24th March 2012, he faced former WBO heavyweight champion Siarhei Liakhovich. The fight took place at Aviator Sports Complex, Brooklyn, New York and was televised on NBC Sports. Jennings controlled the fight with his jab and power punches. He won the fight after Liakhovich retired at the end of round nine. Jennings then faced Steve Collins (25-1) on June 16, 2012 at the Prudential Center, Newark, New Jersey. The fight was co-main event as part of NBC Sports Fight Night event, including Tomasz Adamek vs. Eddie Chambers. He won by unanimous decision after 10 rounds to claim the USBA heavyweight title. Jennings went on to fight two more times in 2012, knocking out Chris Koval in 35 seconds. Then stopping Bowie Tupou in 5 rounds to retain his USBA heavyweight title.