Billy Casper shares lead with Chris Thompson after round one of Tour Championship . Horschel 's wife is due to give birth to their first child this month . ` He is in contention to win the $ 1 million FedEx Cup prize . He says he will keep playing if his wife goes into labor during tournament .
Billy Casper shares lead with Chris Thompson after round one of Tour Championship . Horschel 's wife is due to give birth to their first child this month . He is in contention to win the $ 1 million FedEx Cup prize . He says he will keep playing if his wife goes into labor during tournament .