(CNN)At two meters, 46 centimeters (eight foot, one inch) tall, Morteza Mehrzadselakjaniis the not-so-secret weapon of Iran's sitting volleyball team.

The tallest Paralympian in history and the joint-second tallest man in the world, Mehrzadselakjani, better known as Mehrzad, helped Iran successfully defend its Paralympic title on Saturday with a 3-1 (25-21 25-14 19-25 25-17) victory against the Russian Paralympic Committee (RPC).