ip ri ano ▁provided ▁the ▁opening ▁and ▁closing ▁announ c ements ▁for ▁each ▁count down . ▁Ed ▁Mc M ann ▁and ▁Mike ▁Kas em ▁later ▁held ▁the ▁role . ▁ ▁Sub st itute ▁hosts ▁From ▁time ▁to ▁time ▁Kas em ▁would ▁need ▁to ▁take ▁time ▁off ▁from ▁the ▁count down ▁for ▁various ▁reasons ▁and ▁would ▁require ▁a ▁substitute ▁host . ▁The ▁first ▁sub ▁host ▁for ▁AT 2 0 ▁was ▁David ▁Perry , ▁who ▁had ▁filled ▁that ▁role ▁for ▁Kas em ▁from ▁ 1 9 9 3 ▁until ▁he ▁left ▁his ▁position ▁at ▁West wood ▁One ▁in ▁ 1 9 9 8 . ▁ ▁Over ▁the ▁years , ▁the ▁most ▁frequently ▁used ▁substitute ▁was ▁Ed ▁Mc M ann , ▁who ▁pres ided ▁over ▁forty ▁ed itions ▁of ▁the ▁count down ▁in ▁Kas em ' s ▁absence ▁and ▁also ▁served ▁as ▁the ▁shows ' ▁announ cer ▁for ▁several ▁years . ▁For ▁the ▁final ▁two ▁years ▁of ▁the ▁program , ▁Kas em ' s ▁son ▁Mike ▁was ▁the ▁designated ▁substitute , ▁with ▁ten ▁appearances ▁beginning ▁in ▁late ▁ 2 0 0 7 . ▁ ▁Ryan ▁Se ac rest , ▁Kas em ' s ▁successor ▁on ▁AT 4 0 , ▁would ▁substitute ▁a ▁total ▁of ▁three ▁times ▁in ▁ 2 0 0 3 ▁as ▁he ▁prepared ▁to ▁take ▁over ▁control ▁of ▁the ▁primary ▁count down . ▁Other ▁subst it utes ▁consisted ▁of ▁Steve ▁Stre it , ▁the ▁current ▁CE O ▁of ▁Green ▁D ot ▁Corporation ; ▁former ▁Access ▁Hollywood ▁co - anchor ▁Pat ▁O ' B rien