Just months after signing a new contract, NBC Universal’s top entertainment executive Kevin Reilly was fired by the struggling network, according to published media reports. The Associated Press reported Ben Silverman and Marc Graboff were named as replacements. Silverman and Graboff will both be responsible for all of NBC’s prime-time, daytime and late-night programming. Both will report to NBC Universal President Jeff Zucker, with Graboff concentrating on the business side and Silverman on creative efforts and scheduling, the AP reported. Silverman helped bring “The Office” and “Ugly Betty” to American audiences. Reilly had been entertainment president since 2004. NBC landed in fourth place in the recently finished television season.