If you all really want to know how much tax he will pay here it is....
For winnings of $5,000.01 and over, your state's Department of Revenue removes the 25 percent federal withholding before you receive your winnings check (or, if it is an annuity, from each winnings check). You then receive a W-2G form with each check to submit with your 1040 form to show that the 25 percent federal withholding already has been paid. In addition to federal tax, your state will make additional withholdings for taxes, and most states will deduct other money that you may owe to the state, such as back taxes, child support, loan payments, etc
Missouri 4% state withholding
