- Bats Left, Throws Left
- Height 6' 3", Weight 192 lb.
Reitter made his Bundesliga-1 debut in 2013, allowing 3 runs (2 earned) in 2/3 IP (2 BB) for the Buchbinder Legionäre, who won the title.  In the 2013 European Cup, he saw more work, going 1-1 with a 2.89 EA. He won the opener against the Bern Cardinals with five shutout innings of relief (2 H) after future Dodgers farmhand Sven Schüller was rocked but lost to Adam Clerici and Unipol Bologna. He still led his team in ERA. For the event, he was 6th in ERA (between Tomáš Duffek and Justin Kuehn) and tied Kuehn for 4th in IP (9 1/3).  In the 2013 European Junior Championship, he lost to the Netherlands and Kaj Timmermans, giving up 5 runs (3 earned) in 3 innings for the event. 
He attended the MLB European Academy in 2014.  In the 2014 season, he pitched regularly for the Legionäre, going 3-1 with a 2.80 ERA. He fanned 37 in 35 1/3 IP at age 18.  He had a 1.93 ERA in the 2014 European Cup but walked five in 4 1/3 IP. 
The lefty made Germany's squad for the 2014 European Championship, their youngest-player by about 2 1/2 years behind Daniel Thieben. He made one appearance, relieving Enorbel Márquez in the 6th with a 9-2 lead against Sweden. He began by plunking Peter Johannessen then Philip Gajzler doubled. Nico Filice flew out but Oscar Holmberg doubled in a pair then Adam Sorgi drew a walk. Reitter recovered, getting Oskar Vejkdahl swinging and Par Axelsson on a fly. Germany matched the two runs in the top of the 6th then Reitter had a smoother 7th. He retired Pontus Byström and got Magnus Pilegård looking. Johannessen singled but Gajzler flew out. Nils Hartkopf relieved him in the 8th. 
Reitter fell to 2-0, 4.07 with a save in 2015.  Moving to his hometown Hamburg Stealers in 2016 (he had played for their youth teams), he only pitched one game, allowing two runs in 1 2/3 IP and taking a loss.  It is unclear if he has played since (through 2020).