Answer
Ken Shamrock did win the WWF Intercontinental Championship during his wrestling career. Shamrock is a former MMA fighter who competed in the UFC and Pancrase. He transitioned to professional wrestling in 1997 and joined the WWF. Shamrock won the Intercontinental Championship in 1998 and held it for 128 days. He is the only MMA fighter to have won the WWF Intercontinental Championship.