▁he ▁was ▁a ▁found ing ▁member ▁of ▁the ▁innov ative ▁Wh ole ▁Theatre ▁Company ▁where ▁he ▁star red ▁opposite ▁D uk ak is ▁in ▁Long ▁Day ’ s ▁J our ney ▁In to ▁Night . ▁Jen ner ▁also ▁received ▁wide ▁acc laim ▁as ▁the ▁self - dest ruct ive ▁pitch er ▁in ▁Jonathan ▁Reyn olds ' ▁hit ▁play , ▁Y anks ▁ 3 , ▁Detroit ▁ 0 , ▁Top ▁of ▁the ▁N inth , ▁directed ▁by ▁Alan ▁Ar kin ▁at ▁New ▁York ▁City ’ s ▁American ▁Place ▁Theatre . ▁ ▁Career ▁Jen ner ▁served ▁as ▁a ▁Los ▁Angeles ▁Police ▁Department ▁reserve ▁officer ▁for ▁ 2 1 ▁years . ▁He ▁had ▁early ▁roles ▁on ▁two ▁day time ▁programs , ▁as ▁Tony ▁Cooper ▁on ▁Som erset ▁( 1 9 7 4 – 7 6 ) ▁and ▁as ▁E van ▁Web ster ▁on ▁Another ▁World ▁( 1 9 7 6 – 7 7 ), ▁where ▁he ▁was ▁involved ▁with ▁O live ▁Gordon ▁( J enn ifer ▁Le ak ) ▁in ▁an ▁inf am ous ▁story line ▁plot ▁to ▁kill ▁long - time ▁character ▁John ▁Rand olph ▁( Michael ▁M . ▁Ryan ). ▁In ▁ 1 9 8 1 , ▁Jen ner ▁appeared ▁in ▁several ▁episodes ▁of ▁K not s ▁Land ing ▁as ▁Jeff ▁C unning ham , ▁the ▁ex - hus band ▁of ▁Abb y ▁C unning ham ▁( Don na ▁M ills ). ▁He ▁later ▁had ▁a ▁rec urr ing ▁role ▁as ▁Dr . ▁Jerry ▁K end erson ▁on ▁Dallas ▁( 1 9 8 4