It’s easy to let your DraftKings FLEX spot be left up to the amount of salary remaining after you fill out the rest of the squad. That’s the ‘flex-by-default’ strategy. The purpose of this Week 13 DraftKings DFS article is to help you avoid it. You can and should use the FLEX spot to strengthen and diversify your daily league lineups for Week 13 of the NFL season.

A couple of thoughts: 1) You don’t have to spend all the salary cap. A better player in a better situation may force you to leave a few hundred salary cap dollars on the table. Force yourself to roster the best lineup, even if it fails to use the whole cap. 2) As scientists, we like to use players for which we can build a case based on multiple pieces of evidence.

We look at things like opportunities, efficiency, opponent and game flow to start our research. We want as many players that are positive in all categories as we can fit. Having an idea of the players we want before we work with salaries helps us with #1 too.

Want more fantasy advice? Check out Rotoballer for more expert analysis and the best player options for Week 13.