Ronny Markes pouding on Cully Butterfield (photo via WSOF / NBC)

By WSOF (via press release)

LAS VEGAS (April 9, 2015) – A case of dehydration has rendered Ronny Markes ineligible to compete in the WSOF 20 light heavyweight main event against fellow superstar David Branch tomorrow, Friday, April 10.

Jesse McElligott (5-1), originally slated for action on the WSOF 20 preliminary card, will step up to face Branch (15-3) in the main event. The 24-year-old McElligott of West Roxbury, Mass., is looking for his third straight win.

“Ronny’s condition is an unfortunate situation, but we are glad that his health has improved since the episode he experienced earlier today,” said WSOF PresidentRay Sefo.

“WSOF is committed to the safety of its athletes,” continued Sefo, “and, therefore, there is no way that we could allow Ronny to go on and compete despite the turnaround in his condition.”

WSOF will compensate McElligott’s original opponent, Steve Skrzat, will his full fight purse.

The live NBCSN telecast of WSOF 20 will begin at 9:00 p.m. ET/6:00 p.m. PT. MMA legend Renzo Gracie will call the action alongside veteran WSOF play-by-play announcer Todd Harris.

In the lightweight (155 pounds) co-main event, rising star Nick Newell (11-1) of Springfield, Mass. will face off with battle-tested Joe Condon (12-7) of Victorville, Calif.

Making their respective WSOF debuts, undefeated Ben Fodor (5-0-1), also known as costumed crime fighter “Phoenix Jones” of Seattle, Wash., and fellow rising star and Iraq war veteran Emmanuel Walo (7-2-1) of Jersey City, N.J. will throw down in a 175 pounds catch weight contest.

In other live NBCSN televised main card action at WSOF 20, aggressive finishersOzzy Dugulubgov (6-2) of Hackensack, N.J. and Lucas Montoya (8-3) of Layton, Utah will square off at lightweight, and up-and-coming talents Steve Mocco (4-1) of Coconut Creek, Fla. and Juliano Coutinho (6-1) of West Yarmouth, Mass. will battle at heavyweight.

Tickets for the WSOF 20, priced from $39.99, are on sale at Ticketmaster.com.

Doors at the Grand Theater at Foxwoods Resort Casino open at 5:00 p.m. ET, and the first of four preliminary bouts begins at 6:00 p.m.