Klobosits, a native of Katy, Texas, pitched for Pope John XXIII High School and went on to play for the Galveston College Whitecaps.

[5] With an imposing physical profile at 6 ft 7 in (2 m) and 270 pounds (120 kg),[4] Klobosits was described in 2017 by Baseball America's Carlos Collazo as having "excellent plane" and a potent mid-90s fastball.

[7] Klobosits underwent Tommy John surgery in May 2018 after posting eleven appearances out of the bullpen for the Potomac Nationals.

[11] He appeared in 11 games for the Triple-A Las Vegas Aviators, struggling to a 7.59 ERA with 12 strikeouts in 10.2 innings pitched.

[17] On April 24, 2024, Klobosits signed with the Gastonia Ghost Peppers of the Atlantic League of Professional Baseball.