2009-10: Kerdiles skated for the Los Angeles Selects midget hockey club and represented the USA in the 2010 U17 Four Nations Cup. In 68 games with the Selects he scored 65 goals with 56 assists and 78 penalty minutes. Kerdiles scored 3 goals with 1 assist at the Four Nations Cup. He committed to playing college hockey at the University of Wisconsin in 2012-13.
2010-11: Kerdiles moved to Ann Arbor to play in the US National Team Development Program and skated for the USA in the 2011 U18 World Junior Championship and the U17 World Hockey Challenge. In 20 games with the NTDP U18 squad he scored 3 goals with 7 assists and 6 penalty minutes. At the U18 WJC he had two assists in six games for the gold medal-winning squad. In 40 games with the U17 NTDP team he scored 17 goals with 10 assists and 60 penalty minutes. In six games at the WHC he scored 2 goals with 2 assists.
2011-12: Kerdiles returned to Ann Arbor for a second season and was Team USA's leading scorer at the 2012 U18 World Junior Championship. Kerdiles missed part of the season due to injury. In 18 USHL games with the NDTP he scored 4 goals with 9 assists and had 18 penalty minutes. Kerdiles scored 4 goals with 5 assists and was plus-8 as the USA won gold at the U18 level for the fourth straight year. Kerdiles was ranked 29th amongst North American skaters in Central Scouting's final rankings prior to the 2012 NHL Draft.
Kerdiles is a forward prospect with good size and maturity beyond his years. He projects more as a two-way forward than a purely offensive prospect, but he does have some puckhandling skill. Kerdiles has a good motor and isn't afraid to take the body when the opportunity presents itself. He is not a flashy player but is instead a player that relies on his smarts and effort to make things happen on the ice.