Jamie and Gavin McDonnell will renew their rivalry on June 27 as the retired boxing brothers headline the debut KnockBox event in Doncaster. The new concept competition launches at The Temple with a charity event built around speed, power, precision, and technique rather than physical contact. KnockBox uses a cutting-edge punching system across three rounds,… Read More »McDonnell Brothers to Face Off in KnockBox Debut on June 27
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