Hunter Mahan gave up the lead in the Canadian Open when his wife went into labor, and Brandt Snedeker grabbed the top spot a few hours later Saturday.
Mahan was 13 under after two rounds when he got a call saying wife Kandi had gone into labor with their first child.
The American rushed to the airport for a flight to Texas.
Snedeker had a 9-under 63 at Glen Abbey to take the lead after the rain-delayed third round.
Sweden's David Lingmerth was a stroke back after a 65, and Matt Kuchar and Jason Bohn were 12 under. Kuchar had a 64, and Bohn shot 66.