Jack Hawksworth capitalized on some good fortune to win on his Firestone Indy Lights debut in St. Petersburg.
The Pro Mazda champion had rebounded from a bad start and was running third when leader and Schmidt teammate Gabby Chavez was collected by second-placed Carlos Munoz as the pair went into the first corner on lap 10.
Chavez was an instant retirement, while Andretti driver Munoz was able to continue once serving drive-through penalty for avoidable contact, only to suffer a late gearbox failure.
With a clear track ahead Hawksworth set about opening a substantial gap, eventually crossing the line 4.9 seconds clear of Peter Dempsey. Sage Karam completed the podium ahead of Juan Pablo Garcia.
Zach Veach and Jorge Goncalvez were the only other two classified finishers from the nine-car field after former GP3 runner Ethan Ringel capped off a frustrating weekend by suffering an unspecified mechanical problem early on.
Results - 45 laps:
Pos Driver Team Time/Gap
1. Jack Hawksworth Schmidt 54m06.0120s
2. Peter Dempsey Belardi + 4.9073s
3. Sage Karam Schmidt + 8.0605s
4. Juan Pablo Garcia Moore + 18.2610s
5. Zach Veach Andretti + 20.5404s
6. Jorge Goncalvez Belardi + 21.1040s
Carlos Munoz Andretti 43 laps
Gabby Chaves Schmidt 10 laps
Ethan Ringel Moore 0 laps