Seth MacFarlane at the Oscars. (Chris Pizzello/INVISION/AP)

“Traumatized critics exhale: I’m unable to do the Oscars again,” Seth MacFarlane tweeted Monday afternoon, ending speculation he’d be back, after producers Neil Meron and Craig Zadan were asked back for a second round.

“Tried to make it work schedule-wise, but I need sleep,” explained MacFarlane, who landed a new Fox comedy, “Dads,” and is working on a western and a “Ted” sequel.

For the most part, TV critics hated February’s Academy Awards, in which MacFarlane delivered that for which he’s best known: cheap shots that send young guys howling with laughter. Critics seemed to most hate his “We Saw Your Boobs” production number — though his crack about John Wilkes Booth being only actor who really got inside President Lincoln’s head ran a close second.

MacFarlane is credited with boosting Oscars’ audience, year to year, by 34 percent among 18-to-34-year-old guys — the bedazzled unicorns of the ad world. His audience was nearly 21 million viewers bigger than Tina Fey and Amy Poehler’s at this year’s Golden Globe Awards.

In Monday’s tweet, MacFarlane suggested Joaquin Phoenix host the next Oscars.

That’s a switch. MacFarlane has twice predicted Fey and Poehler would land the gig.