[2] Kaplan made his Bundesliga debut on 11 December 2009 for Bayer Leverkusen against Hertha BSC.

[3] Subsequently, on 13 December 2009, he signed a professional contract with Leverkusen for three years until 2012.

[4] In July 2014, his contract with Beşiktaş was dissolved and he joined German fourth tier Regionalliga West side Wattenscheid 09.

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