|Date of birth||27 October 1993|
|Place of birth||Munich, Germany|
|Height||1.75 m (5 ft 9 in)|
|Playing position||Offensive midfielder|
|2011–2015||1860 Munich II||75||(26)|
|2011–2012||→ Unterhaching (loan)||13||(1)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 13:07, 20 December 2016 (UTC).
Vollmann is a youth exponent of 1860 Munich. After he played his first four games for 1860 Munich II in the 2011-12 season in the Regionalliga Süd he went on a loan to 3. Liga club Unterhaching for the rest of the season and managed to score once in 13 appearances.
In the upcoming years Vollmann was a regular player of 1860 Munich II in the Regionalliga Bayern. In the 2014-15 season he replaced injured Michael Kokocinski as captain in several games and scored 14 goals out of 20 appearances.
After this good run of form Vollmann gave his debut for the first team on 22 November 2014 in a 4-1 away win against Union Berlin being substituted for Valdet Rama in 76th minute. In March 2015 he extended his contract until June 2017. Vollmann played his first full match from the beginning on against Sandhausen on 8 March 2015. On 13 March 2015 he scored his first goal for the first team of 1860 Munich in a 3-0 away win against Greuther Fürth, when he brought his team to a 2-0 lead in the 65th minute.
- As of 23 September 2015
|1860 Munich II||Regionalliga Süd||2011–12||4||1||—||4||1|
|1860 Munich||2. Bundesliga||2014–15||18||1||—||2||0||20||1|
|SV Sandhausen||2. Bundesliga||2015–16||0||0||—||0||0|
- "Germany - K. Vollmann - Profile with news, career statistics and history - Soccerway". soccerway.com. Retrieved 2015-01-18.
- "Union Berlin vs. 1860 München - 22 November 2014 - Soccerway". soccerway.com. Retrieved 2014-11-22.
- "Vitus Eicher & Korbi Vollmann verlängern vorzeitig" [Vitus Eicher & Korbi Vollmann are extending their contracts early]. soccerway.com. 2015-03-01. Retrieved 2015-03-10.
- "1860 München vs. SV Sandhausen - 8 March 2015 - Soccerway". soccerway.com. Retrieved 2015-03-10.
- "Vollmann und die Löwen stürmen den Ronhof" [Vollmann and the lions are storming the Ronhof] (in German). kicker.de. 2015-03-13. Retrieved 2015-03-13.
- "Vollmann weiterer Neuzugang am Hardtwald" [Vollmann another newcomer on Hardtwald] (in German). SV Sandhausen. 20 January 2016. Retrieved 20 January 2016.
- Includes other competitive competitions, including the DFL-Supercup, UEFA Super Cup, FIFA Club World Cup and Relegation Play-Offs.
- Profile at Fussballdaten.de