|Date of birth||22 October 1990|
|Place of birth||Wickede, Germany|
|Height||1.74 m (5 ft 8 1⁄2 in)|
|–2000||FC 09 Fröndenberg|
|2009–2011||Rot Weiss Ahlen||38||(0)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 11:01, 22 December 2016 (UTC).
‡ National team caps and goals correct as of 29 December 2010
As a youth, Blacha played for FC 09 Fröndenberg and Borussia Dortmund. In July 2009, he signed a one-year contract with Rot Weiss Ahlen in the 2. Bundesliga. He made his league debut on 23 August, coming on a substitute for Christian Mikolajczak in the 66th minute against Rot-Weiß Oberhausen. Despite relegation, he signed an extension for the following season. After Ahlen was relegated again in 2011, Blacha signed a two-year contract with fellow 3. Liga side SV Sandhausen.
In January 2015, he left cash-strapped Hansa Rostock and joined promotion aspirant SV Wehen Wiesbaden signing a two and a half years contract until 2017. Despite being on a relegation spot Hansa Rostock had to sell him alike top talent Max Christiansen to fulfill conditions for retaining their 3. Liga license.
He was a part of the Polish national under-19 football team.
- "David Blacha - RW Ahlen" (in Polish). bundesliga.pl. 10 July 2010. Retrieved 16 March 2012.
- "Blacha bleibt in Ahlen". bundesliga.de. 26 May 2010. Retrieved 26 May 2010.
- "SVWW holt Blacha" [SVWW signs Blacha] (in German). SV Wehen Wiesbaden. 9 January 2015. Retrieved 17 January 2015.
- "Christiansen und Blacha: Hansa geht ans Tafelsilber" [Christiansen und Blacha: Hansa is selling off the family silver] (in German). NDR. 9 January 2015. Retrieved 17 January 2015.
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