Jerry Rice has the most yards on receptions in a game on Mondays, with 289 yards versus the Vikings on December 18, 1995.

most monday night football receiving yards, single game
Interpreted as:
most monday night football receiving yards by a player, single regular-season game
12/18/1995Rice12/11/1989Taylor12/20/1982Chandler12/8/2014Jones10/27/1986Clark12/9/1985Rice12/13/2004Bennett10/14/1996Beebe10/21/1991Lofton11/19/2018Hill11/12/1979Hill10/20/1969Maynard9/17/1990Paige10/15/1984Lofton11/17/1986Rice12/25/1995Williams12/6/1976McDaniel12/8/2008Bryant9/10/1984Monk9/7/1981Joiner10/5/1998Moss10/18/1971Taylor9/28/1970Hinton289286260259241241233220220215213212206206204203201200200191190190190
Results may be incomplete. StatMuse has complete game-level data for receiving yards going back to the 1960 season.