Where did this version of Austin Riley come from? - Beyond the Box Score
Historic Racer: May 2012
2004 PILBEAM MP91 LMP2 For Sale
Spark-Sponsored Driver Austin Riley wins season kick-off of the U.S Radical season - Spark Power
Classic Cars November 2017 (Digital)
Radical Motorsport, News
Classic and Competition Car 106
Global Sponsorship Network
Austin Riley, Ozzie Albies hit ninth-inning home runs as Braves get jump on Dodgers - The Boston Globe
Dramatic Leinster Trophy headlines weekend of national racing
Radical Cup: Karts to Cars With Austin Riley – Sportscar365