Leonard Malton was a Starfleet captain in 2402.
He started his Starfleet career seeking ways to combat Jem'Hadar more effectively. By 2402 he became a captain and a soapbox car racer, losing to Brianna Reiss in a Grimsborough 500 simulation, granting her access to precious scientific data. (Star Trek: The Stoneship Files: "Off Coverage")
His name is very similar to that of his photomanipulation model.