The Umpire's Room, Where Does It Sleep That Night?

Ben Stokes played a brilliant innings on day three of the Ashes. He worked so hard to just make sure he was there the next day. The next day, he started timing the ball while he played a couple of really nice straight drives for four. And yes, they both made it look really easy when i been very different. When ever one was worried about the new ball coming in, who looks after the ball as it leaves the field? I don't know exactly but my mate's dad asked that exact question. Can you find out for us, please?