▁mid - way ▁point ▁of ▁the ▁ 2 0 1 2 – 1 3 ▁season , ▁K ieß ling ▁aver aged ▁ 5 . 6 ▁aer ial ▁du als ▁won ▁per ▁game , ▁the ▁most ▁of ▁any ▁player ▁in ▁the ▁Bundes liga . ▁Many ▁of ▁K ieß ling ' s ▁goals ▁were ▁from ▁inside ▁the ▁penalty ▁area ▁and ▁he ▁was ▁noted ▁for ▁getting ▁plenty ▁of ▁goals ▁as ▁po acher ▁– ▁off ▁def lections ▁with ▁his ▁feet ▁or ▁head . ▁In ▁fact , ▁during ▁the ▁ 2 0 1 2 – 1 3 ▁Bundes liga ▁season , ▁ 2 4 ▁of ▁his ▁ 2 5 ▁league ▁goals ▁came ▁from ▁inside ▁the ▁area . ▁ ▁Post – ret irement ▁K ieß ling ▁retired ▁after ▁the ▁ 2 0 1 7 – 1 8 ▁season . ▁He ▁will ▁take ▁up ▁work ▁in ▁the ▁administrative ▁sector ▁of ▁Bayer ▁Le verk us en ▁after ▁the ▁end ▁of ▁his ▁career . ▁In ▁December ▁ 2 0 1 8 , ▁K ieß ling ▁admitted ▁that ▁his ▁wife ▁completed ▁some ▁of ▁his ▁summer ▁training ▁sessions ▁for ▁him . ▁ ▁Career ▁statistics ▁ ▁Club ▁▁ 1 . In cludes ▁D FB - L ig ap okal . ▁ ▁International ▁appearances ▁ ▁Hon ours ▁ ▁Club ▁ 1 . ▁FC ▁N ür n berg ▁▁ 2 . ▁Bundes liga : ▁ 2 0 0 3 – 0 4 ▁ ▁Bayer ▁ 0 4 ▁Le verk us en ▁ ▁D FB - P okal ▁Run ner - up : ▁ 2 0 0 8