Any team can get hot on any given game. Ball bounces right, officials see things one way, what they call and what the DONT call. A player gets hot and single handedly gets the win. Even Aaron Rodgers can throw 3 endzone picks and lose to a 1 win team. etc
I play duplicate (contract bridge) there is no luck because everyone plays the same hands and it is how well you do with the hands, BUT there is luck on who you might play those hands against.
Some contracts are the same for everyone, you want to play those hands against the really good players' where even though they are better there is nothing they can do, and some hand are very complex, and the luck is if you get to play those hands against lesser players who allow you to make a contract that you shouldn't,
BUT in the NFL there is a lot of LUCK, that goes along with the execution.