There’s a late cancellation for tomorrow’s UFC 188 in Mexico City, forcing the show to go on with eleven bouts instead of the usual twelve.

Andrew Todhunter, who was to make his UFC debut at welterweight against Alfred Tumenov, has been pulled from the event after doctors have deemed him “medically unable to compete.”

The news came via an announcement on the UFC website last night.

According to Marc Raimondi of MMA Fighting, the 27 year old Todhunter, an ex-US Army sniper, passed out while trying to make weight.

Raimondi also notes that opponent Tumenov (pictured above) will still weigh in today, and if successful will receive his “show” money.

A statement was given by Todhunter’s manager, UFC veteran Charles McCarthy:

“This is a really unfortunate situation, but health is the number one priority. Andrew was excited as anyone I’ve ever seen to make his UFC debut. But I know he’ll be back soon and he’ll make a major impact when he is.”

The news also appears to represent a tough break for Tumenov, who is eager to maintain career momentum after three straight wins in the UFC. The Russian was originally scheduled to face Hector Urbina, who had won his last two bouts — including a submission victory over Edgar Garcia at the UFC’s Mexico show last year. But then Urbina was forced to bow out due to injury, leading to Todhunter’s opportunity.

The UFC 188 weigh-ins will take place at 7 pm ET, 4 pm PT. We’ll have the full results here at Caged Insider.