, ▁Late ▁Night ▁with ▁Con an ▁O ' B rien , ▁and ▁The ▁Ton ight ▁Show ▁with ▁Jay ▁L eno . ▁He ▁has ▁been ▁head lin ing ▁comedy ▁clubs ▁and ▁the aters ▁for ▁the ▁past ▁fifteen ▁years . ▁ ▁He ▁is ▁best ▁known ▁for ▁his ▁role ▁as ▁D anny ▁He f fer nan ▁on ▁The ▁King ▁of ▁Queens , ▁playing ▁the ▁cousin ▁of ▁principal ▁character ▁Doug ▁He f fer nan ▁( per formed ▁by ▁his ▁real - life ▁brother ▁Kevin ▁James ) ▁for ▁nine ▁seasons . ▁He ▁appeared ▁on ▁the ▁television ▁show ▁Men ▁of ▁a ▁C ertain ▁Age , ▁which ▁was ▁written ▁and ▁directed ▁by ▁Ray ▁Rom ano ▁and ▁met ▁with ▁critical ▁acc laim . ▁Prior ▁to ▁his ▁run ▁on ▁the ▁series , ▁he ▁star red ▁in ▁his ▁own ▁half - hour ▁special ▁on ▁Com edy ▁Central ▁and ▁hosted ▁The ▁X ▁Show ▁on ▁F X . ▁ ▁On ▁the ▁big ▁screen , ▁Valent ine ▁has ▁appeared ▁in ▁St uck ▁on ▁You ▁and ▁I ▁Now ▁Pr on ounce ▁You ▁Ch uck ▁and ▁Larry . ▁He ▁also ▁had ▁a ▁came o ▁in ▁Jerry ▁Se inf eld ' s ▁document ary ▁Com ed ian . ▁ ▁More ▁recently , ▁he ▁makes ▁occas ional ▁appearances ▁as ▁a ▁round table ▁com ed ian ▁on ▁the ▁E ! ▁Network ▁late - night ▁talk ▁show ▁Ch else a ▁L ately ▁and ▁also ▁takes ▁part ▁in ▁the ▁D ust y ▁Pe ac ock ▁web ▁series ▁on ▁Cra ck le . ▁ ▁Valent ine ▁performs ▁comedy ▁t ours ▁in ▁clubs ▁across ▁the