2008-09: Pat Nagle split time with freshman Taylor Nelson, appearing in 22 of 38 games for Ferris State as a sophomore. Nagle was 7-11-3 with a 2.84 GAA and .909 save percentage for the Bulldogs, who finished ninth in the CCHA.
2009-10: Nagle skated in 26 of 40 games as a junior for Ferris State as the Bulldogs finished third in the CCHA. He was 12-10-3 with one shutout and had a 2.13 GAA and .923 save percentage.
2010-11: Nagle was one of the top goalies in college hockey as a senior for Ferris State. In 37 games for the Bulldogs he was 18-14-5 with 3 shutouts and was named to the NCAA West First All-American team and the CCHA First All Star Team. He had a 2.02 GAA with a .923 save percentage. Nagle signed a two-year, entry-level contract with Tampa Bay in March 2011.
2011-12: Nagle split the goaltending duties for the ECHL Kelly Cup champion Florida Everblades with former Boston College goalie John Muse in his first pro season. Nagle was 20-14-3, appearing in 39 games, and had 1 shutout with a 2.87 goals against and .905 save percentage. The Everblades finished third in the South Division but rolled through the ECHL playoffs. While Muse made the bulk of the starts in the playoffs, Nagle appeared in six games and was 4-1 with 2 shutouts and had a 1.42 goals against and .941 save percentage.
Nagle signed a one-year contract with the AHL's Texas Stars in August of 2013.