RYAN SEACREST has been named PAT SAJAK's successor as host of the syndicated "WHEEL OF FORTUNE." SAJAK announced his pending retirement two weeks ago and will be stepping down next year; SEACREST recently exited the syndicated TV talk show "LIVE WITH KELLY AND RYAN" but continues his iHEARTMEDIA and Top 40 KIIS/LOS ANGELES hosting duties as well as hosting ABC's "AMERICAN IDOL."SEACREST issued a statement saying, "I'm truly humbled to be stepping into the ...