17 players are tied for the most games by a quarterback in a loss with 300+ passing yards, with 1 game. The first three are Mason Rudolph and Drew Lock on January 3 and Tua Tagovailoa on January 3 and on December 13.

most games with 300 or more passing yards by a quarterback in a loss
Interpreted as:
most games with 300 or more passing yards by a quarterback in a regular-season loss

See Trending NFL Searches