Neagle attended Thomas Jefferson High School, where he was a three-year starter and helped them to a 16-2-4 record and the State 4A championship as a senior.

[1] Upon graduating high school, Neagle attended and played college soccer for the University of Nevada Las Vegas.

[3] Neagle was the fourth player from Washington state to sign with the Sounders after Chris Eylander, Kevin Forrest, and Kasey Keller.

Neagle was also on the team roster for the Houston Dynamo and Kansas City Wizards games but sat on the bench.

[7] He subsequently signed for Charleston Battery (who employ him as a forward) in the USL Second Division, and made his competitive professional debut on April 17, 2010, in a game against the Charlotte Eagles.

[9] In 2011, Neagle worked his way onto the pitch as a frequent sub and occasional starter for MLS matches, also playing important roles in the US Open Cup and CONCACAF Champions League.

[citation needed] On August 27, 2011, Neagle netted the first home MLS hat-trick for the Sounders in a 6–2 victory over the Columbus Crew, at the time the leaders in the Eastern Conference.

[12] Neagle notched his second of the MLS campaign against the San Jose Earthquakes on August 18, 2012, a 22-yard (20 m) shot that went on to win AT&T Goal of the Week honors.

[13][14] On January 27, 2013, the Sounders traded an international roster spot to the Montreal Impact in order to re-acquire Neagle for his third stint with the team.

[15] On March 7, Neagle made his debut and scored his first goal with United in a 1–4 away loss to LA Galaxy in the 2016 Major League Soccer season opener.