Danny O’Connor has pulled out of his first world title fight after collapsing attempting to make the 10-stone weight limit.
O’Connor, 33, was due to fight fellow American Jose Ramirez for the WBC light-welterweight belt on Saturday.
The WBC confirmed he was taken to hospital suffering “dehydration symptoms”, while his promoter said he thought his kidneys had “shut down”.
O’Connor said he “let the idea of being a world champion cloud my judgement”.
Promoter Joe DeGuardia of Star Boxing said his fighter, who has won 30 of his 33 professional bouts – 11 by knockout – “collapsed leaving the sauna” while attempting to cut a “perfectly normal” two pounds.
O’Connor posted an image of himself in hospital on social media, saying: “Heartbreaking to be rushed to the hospital and deemed medically unfit to fight.
“Nothing is more important than my health.”