Pettys, being eligible to represent both the United States (via birth) and the Philippines (via heritage on his mother's side), chose to join the Philippines national football team after being invited to the national team pool in February 2014 by head coach Thomas Dooley. He made his international debut as a substitute in a 3–0 win over Nepal in Doha, Qatar on April 11, 2014. His full international cap was the first by a Kentucky Wildcats player.
