Last Saturday night, two-time Argentinean Olympian Alberto “Impact” Melian turned professional the “Lomachenko way” by knocking out the former world title challenger Diego Ricardo Santillan in the fifth round. Fighting in front of a sold out F.A.B. Stadium in his hometown of Buenos Aires, Melian hit Santillan (now 23-3, 15 KOs) with a sizzling right …