9 9 4 ) ▁is ▁a ▁German ▁professional ▁footballer ▁who ▁plays ▁as ▁a ▁def ensive ▁mid f iel der ▁for ▁Hol stein ▁K iel . ▁ ▁Career ▁On ▁ 6 ▁May ▁ 2 0 1 4 , ▁he ▁signed ▁a ▁three - year ▁contract ▁with ▁Kar ls ru her ▁SC . ▁ ▁On ▁ 3 1 ▁May ▁ 2 0 1 6 , ▁he ▁signed ▁for ▁SC ▁Fre ib urg . ▁ ▁In ▁July ▁ 2 0 1 8 , ▁M ef fert ▁joined ▁ 2 . ▁Bundes liga ▁side ▁Hol stein ▁K iel ▁signing ▁a ▁three - year ▁contract ▁until ▁ 2 0 2 1 . ▁ ▁Career ▁statistics ▁▁ 1 . In cludes ▁German ▁Cup . ▁ 2 . In cludes ▁UEFA ▁Europa ▁League . ▁ 3 . In cludes ▁Prom otion / re leg ation ▁play off . ▁ ▁References ▁ ▁External ▁links ▁▁▁ ▁Jon as ▁M ef fert ▁at ▁world football . net ▁▁▁ ▁Category : 1 9 9 4 ▁birth s ▁Category : L iving ▁people ▁Category : Associ ation ▁football ▁mid field ers ▁Category : G erman ▁football ers ▁Category : G erm any ▁youth ▁international ▁football ers ▁Category : B ayer ▁ 0 4 ▁Le verk us en ▁II ▁players ▁Category : B ayer ▁ 0 4 ▁Le verk us en ▁players ▁Category : Kar ls ru her ▁SC ▁players ▁Category : SC ▁Fre ib urg ▁players ▁Category : Hol stein ▁K iel ▁players ▁Category : B undes liga ▁players ▁Category : 2 . ▁Bundes liga