Boxer Patrick Day dies after knockout

Charles Conwell (black trunks) and Patrick Day (red trunks) box during a USBA Super-Welterweight boxing match at Wintrust Arena. Patrick Day passed away from injuries he sustained from this match. Mandatory Credit: Jon Durr-USA TODAY Sports

Patrick Day (red trunks) reacts after getting knocked down by Charles Conwell (not pictured) during a USBA Super-Welterweight boxing match at Wintrust Arena. Mandatory Credit: Jon Durr-USA TODAY Sports

Charles Conwell (black trunks) knocks out Patrick Day (red trunks) during a USBA Super-Welterweight boxing match at Wintrust Arena. Mandatory Credit: Jon Durr-USA TODAY Sports

Charles Conwell (black trunks) and Patrick Day (red trunks) box during a USBA Super-Welterweight boxing match at Wintrust Arena. Mandatory Credit: Jon Durr-USA TODAY Sports

Charles Conwell (black trunks) and Patrick Day (red trunks) box during a USBA Super-Welterweight boxing match at Wintrust Arena. Mandatory Credit: Jon Durr-USA TODAY Sports

Charles Conwell (black trunks) and Patrick Day (red trunks) box during a USBA Super-Welterweight boxing match at Wintrust Arena. Patrick Day passed away from injuries he sustained from this match. Mandatory Credit: Jon Durr-USA TODAY Sports

Patrick Day (red trunks) is tended to by paramedics after being knocked out by Charles Conwell (not pictured) during a USBA Super-Welterweight boxing match at Wintrust Arena. Mandatory Credit: Jon Durr-USA TODAY Sports

Charles Conwell (black trunks) and Patrick Day (red trunks) box during a USBA Super-Welterweight boxing match at Wintrust Arena. Mandatory Credit: Jon Durr-USA TODAY Sports

Charles Conwell (black trunks) knocks out Patrick Day (red trunks) during a USBA Super-Welterweight boxing match at Wintrust Arena. Mandatory Credit: Jon Durr-USA TODAY Sports

Charles Conwell (black trunks) knocks out Patrick Day (red trunks) during a USBA Super-Welterweight boxing match at Wintrust Arena. Mandatory Credit: Jon Durr-USA TODAY Sports

Charles Conwell (black trunks) and Patrick Day (red trunks) box during a USBA Super-Welterweight boxing match at Wintrust Arena. Mandatory Credit: Jon Durr-USA TODAY Sports

Charles Conwell (black trunks) and Patrick Day (red trunks) box during a USBA Super-Welterweight boxing match at Wintrust Arena. Patrick Day passed away from injuries he sustained from this match. Mandatory Credit: Jon Durr-USA TODAY Sports

Patrick Day (red trunks) reacts after getting knocked down for the second time in his match against Charles Conwell (not pictured) during a USBA Super-Welterweight boxing match at Wintrust Arena. Patrick Day passed away from injuries he sustained from this match. Mandatory Credit: Jon Durr-USA TODAY Sports

Patrick Day (red trunks) is tended to by paramedics after being knocked out by Charles Conwell (not pictured) during a USBA Super-Welterweight boxing match at Wintrust Arena. Mandatory Credit: Jon Durr-USA TODAY Sports

Patrick Day (red trunks) before his match against Charles Conwell (not pictured) during a USBA Super-Welterweight boxing match at Wintrust Arena. Patrick Day passed away from injuries he sustained from this match. Mandatory Credit: Jon Durr-USA TODAY Sports