Vaughn's contract came into effect July 2020 and will run through June 2026, securing the head coach that brought the Terps to the NCAA tournament for the first time since 2017.
Cowles was the second and final Maryland player taken in the draft.
The Terps' former ace is the highest draft pick from Maryland baseball since Brandon Lowe in 2015.
The Terps dominated in both sides of the game as they launched seven homers and Sean Burke put together a strong start.
The Terps walked off the Hoosiers in the first game, while Sean Burke took a no-hitter into the seventh inning of game two.
The Terps now sit tied for second place in the Big Ten.
Sean Burke allowed one earned run in a bounceback start for the Terps.
Vought clubbed three home runs in the second game of the twin bill as the Terps won the series.
The surging Terps earned a series sweep against the bottom-of-the-conference Golden Gophers.
The Terps were unable to put runners in scoring position for the final three innings.