Frank Mir to face Cain Velasquez

Another high-profile heavyweight bout has been added to UFC 146.

Former heavyweight champion Cain Velasquez has agreed to face Frank Mir on May 26, promotion president Dana White said Wednesday.

"Verbal agreements are in for a No. 1 contender match between former UFC world heavyweight champions Frank Mir and Cain Velasquez at UFC 146 in Las Vegas," White said on UFC.com.

In the main event, UFC heavyweight champion Junior dos Santos makes the first defense of his title against current No. 1 contender Alistair Overeen.

Former Strikeforce heavyweight contender Antonio Silva is slated to face Roy Nelson. UFC announced the Silva-Nelson bout on Wednesday.

Velasquez claimed the heavyweight title in October 2010 with a first-round TKO of Brock Lesnar. But he suffered a torn right rotator cuff in that bout and was sidelined for more than a year.

Velasquez returned to action on Nov. 12 against dos Santos and was stopped in the first round. It was Velasquez's lone title defense.

Mir won the UFC interim heavyweight belt in December 2008 with a second-round TKO of Antonio Rodrigo Nogueira.

He would relinquish the title in July 2009 to Lesnar during a unification bout.

Mir would come up short in a second attempt at claiming the interim belt. Shane Carwin knocked him out in the first round at UFC 111 on March 27, 2010.