Hometown: Munich, Germany
Birth date: August 20, 1987
Acquired: Signed on July 26, 2017, having previously been at 1860 Munich
- Aigner was an unused substitute for the home leg of the Scotiabank CONCACAF Champions League match with Toronto FC (2/20), but missed the second leg (2/27) as he pursued his Green Card. (He no longer occupies an international spot on the roster).
- Missed the trip to New England Revolution (3/10) due to a minor hamstring injury. His fitness was again a factor in him sitting out the home opener with Sporting Kansas City (3/24).
- The German made his first appearance of 2018 in the latter stages of the 3-0 win over Philadelphia Union at DICK'S Sporting Goods Park (3/31), replacing Joe Mason with 11 minutes remaining.
- He was not in the 18 for the trips to FC Dallas (4/7) and Real Salt Lake (4/21), or the home game with Toronto FC (4/14).
- Aigner came through the youth ranks at 1860 Munich, before joining SV Wacker Burghausen at the start of the 2006-07 season.
- His professional debut came on August 11, 2006 with a 4-0 home loss to Karlsruher SC in Bundesliga 2. Aigner came on for Ronald Schmidt for the final 23 minutes of the game.
- He would go on to make 28 appearances for the team, scoring five goals. Burghausen were relegated at the end of the season, whereupon Aigner moved to Arminia Bielefeld.
- Aigner’s first team time at Bundesliga side Bielefeld was limited to just five substitute appearances in the early stages of the 2008-09 campaign, including games at Bayern Munich and Stuttgart.
- He emerged after the winter break at 1860 Munich, making his debut in a 3-1 German Cup loss at SV Hamburg on January 27, 2009. Among his teammates that day were Gregg Berhalter - now head coach at Columbus Crew SC - and US international defender Fabian Johnson.
- After three years at 1860, Aigner was on the move again, taking a step up to the Bundesliga with Eintracht Frankfurt. His first start in the top flight came on September 1, 2012 in a 4-0 win at nine-man Hoffenheim.
- The German midfielder spent four years at Eintracht Frankfurt, during which time he played - and scored - in the UEFA Europa League. He counted Kevin Trapp, US international Timothy Chandler, Paraguay’s former Seattle Sounders striker Nelson Valdez, Tranquillo Barnetta, and Marco Fabian as teammates.
- His last hurrah in the Bundesliga came toward the end of the 2015-16 season, when he scored winning goals in successive games. This included the only goal in a 1-0 win over a Borussia Dortmund side which contained Henrik Mkhitaryan and Christian Pulisic.