Leary, who was a longtime ESPN personality, has left the network after a five-year run.
He’s been with FX since 2007.
O’Brien was the first female executive to hold the network’s top position, after a four-year tenure.
He had previously been with ESPN for more than 20 years.
In an interview with The Associated Press, O’Reilly said that the network “has been a life-altering experience.”
“I never would have dreamed it would be this close to my heart,” O’Donnell said.
I never would’ve thought I would have gotten this opportunity.” “
But I’m so grateful for the opportunity to work at ESPN.
I never would’ve thought I would have gotten this opportunity.”
ESPN is expected to announce more details about O’Loughlin’s departure at a news conference in New York on Wednesday.
Reilly’s departure comes after ESPN has been criticized for its treatment of former New York Giants running back Rashad Jennings and former NFL running back Ray Rice.
ESPN is also under fire for its handling of the Harvey Weinstein sexual assault scandal.
The network was forced to fire two of its female executives and has suspended several prominent women.