NBC broadcaster Mike Tirico exits Kentucky Derby coverage after nut allergy reaction

NBC's Kentucky Derby coverage was missing a key figure when lead broadcaster Mike Tirico had to step off set Saturday. 

Tirico address his absence in a social media post around Saturday evening, saying it was due to a "signifigant" allergic reaction, as Tirico claims to have a nut allergy. 

Ahmed Fareed entered in relief of Tirico Saturday afternoon, announcing Tirico had an unspecified illness. 

"Mike, as you may have heard, feeling a little under the weather right now, so I'm going to step in, take over for a bit," Fareed said. 

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Fareed also suggested Tirico may re...