Conwell, who is 11-0 with eight knockouts, said in an Instagram post that he was overwhelmed with guilt.

Conwell continued, I was thinking about quitting Boxing, but I know that’s not what you would want.

Day was born on August 9, 1992, and grew up in Freeport, N.Y., according to his profile on the DiBellas website. His Boxing record was 17-4-1 with six knockouts, and he was an Olympic alternate in 2012. In 2017, he won the Continental American championship, which he followed up with the I. B. F. Intercontinental championship in 2019, his biography said.

He was the youngest of four sons born to Haitian immigrants and began training on the Everlast punching bag in the garage of a neighbor, Joe Higgins, a retired new York city firefighter who lost his brother, Timothy, in the September 11 terrorist attack on the world trade Center, according to an ESPN Profile of the day.

The day was Higgins star apprentice in the Freeport P. A. L., or police Athletic League.

In the profile, Higgins, who had two throat surgeries and PTSD after responding to the world trade center website, credited the day with saving his life.