|Date of birth||21 January 1987|
|Place of birth||Eschweiler, West Germany|
|Height||1.73 m (5 ft 8 in)|
|2006–2009||Bayer Leverkusen II||89||(12)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 19:20, 15 April 2017 (UTC).
After spending three seasons with Bayer 04 Leverkusen's reserve team early in his career, Kratz joined Alemannia Aachen in the 2. Bundesliga. After Aachen was relegated from the 2. Bundesliga at the end of the 2011–12 season, he transferred to Eintracht Braunschweig. With his new club, Kratz won promotion to the Bundesliga in 2013. After the 2013–14 Bundesliga season, Kratz transferred to SV Sandhausen.
In September 2016, Kratz signed with Philadelphia Union of Major League Soccer in the United States. Union Sporting Director Earnie Stewart indicated that Kratz would find a place in the Union midfield, stating "Kevin provides us valuable depth in multiple positions across our midfield." Union coach Jim Curtin likewise indicated that Kratz would fit into a central position in the midfield but suggested that he would be used as a backup for existing Union players. Philadelphia later announced that Kratz would not be returning to the team for the 2017 season, and that despite earlier reports, Kratz was not signed as a free agent but was on-loan from MLS expansion team Atlanta United FC.
Atlanta United FC
On December 11, 2016, Philadelphia announced that it had completed its transaction to send midfielder Kratz to Atlanta United, acquiring the expansion club’s fourth-round pick in the 2020 MLS SuperDraft in exchange for Kratz.
- As of matches played on 15 December 2016.
|Bayer Leverkusen II||2006–07||Regionalliga Nord||28||2||—||28||2|
|Alemannia Aachen||2009–10||2. Bundesliga||18||1||1||0||19||1|
|Eintracht Braunschweig||2012–13||2. Bundesliga||18||0||1||2||19||2|
|SV Sandhausen||2014–15||2. Bundesliga||15||0||0||0||15||0|
- "Eintracht holt Kevin Kratz". eintracht.com (in German). Retrieved 21 May 2012.
- "Kratz von Braunschweig nach Sandhausen" [Kratz from Braunschweig to Sandhausen] (in German). DFL. 19 May 2014. Retrieved 20 May 2014.
- "Philadelphia Union sign German midfielder Kevin Kratz". philadelphiaunion.com. 15 September 2016.
- "Philadelphia Union press conference recap". brotherlygame.com. 22 September 2016.
- "Philadelphia Union Officially Completes Transaction With Atlanta United FC". 11 December 2016.
- "Kevin Kratz » Club matches". World Football. Retrieved 15 December 2016.