Sorry if this already has been posted. It didn't come up in a search of posts the last week. Please remove if needed.
Speculation the Giants player is Jeff Kent in article below:
Article excerpt:
Bills QB Josh Allen was once brutally snubbed by an SF Giants player, and has never forgotten it (sfgate.com)
Eric Ting, SFGATE
Dec. 5, 2020 Updated: Dec. 5, 2020 7:13 a.m.
"Buffalo Bills quarterback Josh Allen grew up in Firebaugh, a small town outside Fresno, and was both a San Francisco 49ers and San Francisco Giants fan as a kid.
He retained his love for the 49ers, stating that prior to his final year at the University of Wyoming in 2017 he wanted nothing more than to be drafted by the team. But his love for the Giants may have cooled a bit following an incident involving a young Allen and an unnamed Giants player after one of the team's home games.
[...]
Brown said that he would "put lots of money" on the mystery monster being Jeff Kent, which checks out. Kent of course was once kicked off his high school baseball team for an "attitude problem" and fought Bonds in the dugout during the 2002 season."