What Is An IDP League

Fantasy IDP Leagues: A Beginner’s Guide

Fantasy IDP leagues have been around for as long as the game itself. While not for everyone, IDP leagues add an entirely new level of challenge and enjoyment to the fantasy game. But if you have never played in an IDP league before, they can seem confusing and maybe a little intimidating. So we’ll try to break it down for you.

IDP vs Standard Defense

In most standard fantasy football leagues, each team may have the option of drafting and starting a team defense. That team defense typically scores points for you based on how many points are scored against it, and how many big plays the defensive units generate. While this format makes for an easier-to-manage team, the downside of this format is that the performance of team defensive units usually has more to do with the offense they are playing than the quality of the unit itself. Besides, where’s the fun in choosing an entire half of a team to play as a single unit? You’d never play in a league where you had to start a team offense instead of a QB, RB, WR, & TE, would you?

With the IDP format, you start specific defensive players instead of an entire team defense. Some IDP leagues start just a couple of defensive players, others start as many or more IDPs than offensive players. Each defensive player is scored based on their individual performance. They earn points for tackles, sacks, interceptions, defended passes, and of course touchdowns scored. The IDP scoring systems are as diverse as the offensive scoring systems, so just as with the offensive side of a fantasy team, it’s critical that you understand the IDP scoring system and lineup requirements of your league.

Know Your Scoring System

Even though IDP leagues have been around for a long time, there really isn’t a universal “standard” scoring format. Just as the offensive side of the ball has two major variations (PPR and Non-PPR), the defensive side has “tackle-heavy” scoring and “sack-heavy” scoring.

Tackle-heavy leagues are just like they sound – they diminish the pass-rushing specialists and reward the guys making the tackles. The 4-3 middle linebackers, weak-side linebackers, and safeties are the main beneficiaries in this scoring system. The players taking the biggest hits are 3-4 outside linebackers. Rarely do the 3-4 outside linebackers accumulate high tackle numbers as most of their damage is done bringing down the quarterback. If they fail to record a sack in the game, odds are you’re stuck staring at a goose egg, and there is nothing worse than a player giving you zero points for the week, offensively or defensively.

On the flip side, sack-heavy scoring rewards the gamblers who draft sack specialists. Sack-heavy scoring leagues are considered any league with a 5:1 sack to tackle ratio. For example, if a solo tackle is worth one point and a sack is worth four points, the sack will actually register as five points because the sack is counted as a tackle too. If you get points for tackles for loss, you get an additional bonus for the play. Your tackle-heavy linebacker is going to have to record five solo tackles to offset the one sack. Obviously, you want to find the players who offer high upside in both formats.

Ideally, you want to use a scoring system that finds a balance and suits the interests of the entire league.

When to Draft Individual Defensive Players

Before you can answer this question, you have to know how many IDPs each team must start. Basic IDP leagues often only use three to four IDPs. In this scenario, you should probably only take them late in the draft and carry few, if any, IDP reserves. The waiver wire will be littered with plenty of plug-and-play options each week. You can very easily use weekly rankings from various sites to find a suitable IDP lineup.

Deeper IDP leagues start 2 DLs, 3 to 4 LBs, and 2 DBs. Some leagues require DEs and DTs to be listed separately instead of being lumped together as DLs, and the same for CBs and SFs instead of DBs. In this format, defensive players should be drafted much earlier, with some elite IDPs being drafted as early as the third round, though the fourth or fifth round is a more typical starting point for drafting IDPs.

IDP leagues are just another variation of the same game you play now. It might seem overwhelming at first because you may not know the defensive players as well as you know the offensive players. But that’s what we are here for – to help you learn the IDP game and know the defensive players as well as you know the offense. The following resources will help you in that journey.