There's a tradition of retiring jersey numbers worn by legendary players like Sachin Tendulkar's No. 10', and in a sad note, that of Phillip Hughes' number 64 in the Australian cricket team. Now, with the introduction of jersey numbers in Test cricket, the Board of Control for Cricket in India (BCCI) may soon retire No. 7 too as Mahendra Singh Dhoni will no longer play the traditional format of the game.