What was Goff's best game mentioned in the text?
Goff's best game mentioned in the text was on October 2 when he threw four touchdowns passes, and added a tenure-high 378 passing yards during a 48–45 loss to the Seattle Seahawks.

Goff played another good game against the Washington Commanders, when he threw for 256 yards and four touchdowns in a 36–27 victory, but this performance wasn't as good as the game against the Seahawks because he threw for fewer yards even though he threw for the same amount of touchdowns.

Note that the text is also missing information that would be useful in judging Goff's performance such as QBR, completion percentage, etc.