Nicholas Phillip Margevicius (/mɑːrˈɡævɪtʃɪs/ mar-GAV-ih-chiss;[1] born June 18, 1996) is an American professional baseball pitcher who is a free agent.

He has previously played in Major League Baseball (MLB) for the San Diego Padres and Seattle Mariners.

He split the 2018 season between the Fort Wayne TinCaps and the Lake Elsinore Storm, accumulating a 10–8 record with a 3.60 ERA in 134.1 innings.

[12] In his debut as a starter for the Mariners, Margevicius pitched 3.1 scoreless innings against the Colorado Rockies while recording 3 strikeouts.

Margevicius earned his 2nd win as a starter for the Mariners during his last start of the season when he pitched 6 scoreless innings against the defending AL Pennant winners Houston Astros recording 4 strikeouts in the process.

[15] In 20 games split between the Triple–A Gwinnett Stripers and Double–A Mississippi Braves, he registered a combined 6.82 ERA with 49 strikeouts across 68+2⁄3 innings pitched.