From a source I found, seems like the bulk of the pandemic aspect happened in the US between Dec. 1968-Mar. 1969 with a less-deadly secondary wave between Nov. 1969-Jan. 1970 (
https://academic.oup.com/jid/article/192/2/233/856805), so it wouldn't have really hit during football season, however another source (
https://ajph.aphapublications.org/doi/10.2105/AJPH.2019.305557) says:
US influenza activity increased dramatically in October. The first reported civilian outbreak in the continental United States was identified in Needles, California, with more than one third of its population reporting ILI. ILI reports in Colorado increased from 62 cases for the week ending November 2 to 670 for the week ending November 9,
11 a week in which other western states and Hawaii also reported outbreaks.
12 The first outbreaks in eastern states occurred the next week. All 50 states experienced increased school absenteeism during the pandemic; 23 faced school and college closures and 31 saw elevated worker absenteeism. The peak week of influenza activity for most states fell between December 14 and January 11, with pandemic activity generally starting in the western United States and moving eastward. Newspaper articles chronicled the widespread college closures, slowdowns in business and industry, and threats to Christmas mail deliveries....National concerns were reflected in a December 19
New York Times editorial describing the pandemic as “one of the worst in the nation’s history,” bemoaning the “amount of discomfort and distress suffered by the millions who have already been hit,” and the potential for “billions of dollars” associated with treatment and lost productivity.
Sounds like there were roughly 100,000 deaths in the US over the two waves.