Two major college conferences — the Big Ten and Pac-12 — each announced Tuesday they were sidelining college football and other fall sports because of the coronavirus, just weeks before schools were scheduled to play their first games. The Big Ten, which includes universities with powerhouse sports programs, such as Ohio State, Michigan, Nebraska, Wisconsin, Penn State and Michigan State, said it will look at holding some competitions in the spring. The Pac-12, which includes elite sports programs Stanford, UCLA, USC and University of Oregon, announced shortly after the Big Ten, adding that officials reached a unanimous decision to call off athletic competition through the calendar year.