Buy a ticket and join the crowds at a game at Mohammedan Sporting Ground. If there's nothing scheduled while you're there, you might like to check if the stadium offers a tour of the facilities.
This sporting facility in Kolkata is popular with travelers, so make a spot for it on your to-do list. Don't think that's all there is to do here, though. There are loads more places waiting for you to check out after Mohammedan Sporting Ground. Victoria Memorial, Eden Gardens, and Salt Lake Stadium are close by.