ESPN college football reporter Allison Williams announced on Friday that she has decided to leave the network after her request for an exemption to the company’s COVID-19 vaccine mandate was rejected. The sports broadcaster, who last month announced that she was opting out of the season over ESPN’s vaccine mandate while she and her husband “try for a second child,” said on Friday night that her “request for accommodation” had been denied. Williams, 37, said in an Instagram video that she will be “separated from the company” effective next week. She said last month that it would be the first time in 15 years that she wouldn’t be on the sidelines for college football. “Belief is a word I’ve been thinking about a lot lately because, in addition to the medical apprehensions regarding my desire to have another child in regards to receiving this injection, I am also so morally …