Power Ball actors

I wonder how announcers are chosen to read the winning lottery numbers?  Since I seldom buy lottery tickets (my husband used to call them a tax on the mathematically challenged) I have time to listen to the announcers without getting too hung up on the numbers.  I think it's amusing how they try to put so much enthusiasm into saying each number.  I can imagine the auditionss.  "Read the number 10 with feeling, now 11."  And what comes next?  If you excel at reading numbers on little balls, where do you go from there?  Nope, I can't thinl of the next logical step, but I doubt if you'll make much money from franchized reruns.