Mitrione made disparaging remarks about transgender female mixed martial artist Fallon Fox on April 8 and was suspended hours later.
"She's not a he, he's a he," the 34-year-old Mitrione said. "He's chromosomally a man. He had a gender change, not a sex change. He's still a man. He was a man for 31 years, 31 years.
"That's a couple years younger than I am. He's a man. Six years of taking performance de-hancing drugs you think is going to change all that? That's ridiculous.
"That is a lying, sick, sociopathic, disgusting freak. And I mean that."
Mitrione's remarks came two days after he improved to 6-2 with a first-round knockout of Phil de Fries in Stockholm, Sweden. The win ended his two-fight skid.
"The UFC was appalled by the transphobic comments made by heavyweight Matt Mitrione in an interview on the 'MMA Hour,'" the promotion said on its website after its decision to suspend Mitrione.
"The organization finds Mr. Mitrione's comments offensive and wholly unacceptable and -- as a direct result of this significant breach of the UFC's code of conduct -- Mr. Mitrione's UFC contract has been suspended and the incident is being investigated.
"The UFC is a friend and ally of the LGBT community, and expects and requires all 450 of its athletes to treat others with dignity and respect."
Schaub (9-3) ended a two-fight losing streak Feb. 23 at UFC 157 with a unanimous decision over Lavar Johnson, who was released by the promotion in March after failing a postfight drug test.
Johnson (17-2) was slated to face Moraga on July 13, but the champion pulled out of the bout because of a shoulder injury.
Moraga, a submission expert, brings a seven-fight win streak into the contest. He has a professional MMA record of 13-1.
Carmouche (8-3) was submitted in the first round by champion Ronda Rousey on Feb. 23 in Anaheim, Calif. Tate (13-4) suffered a third-round TKO to Cat Zingano during a title eliminator April 13 in Las Vegas.