I'm willing to be that if you've played fantasy football for more than a year or two that you've played in a league hosted by Yahoo.

It's massively popular and pretty dang reliable, so I can't blame you.

But depending on your host site, you might have to reach an extra round -- or three -- for your favorite sleeper if he's ranked higher in the Yahoo draft app than he is in your typical mock drafts. All that preparation, all that planning, could prove fruitless if you aren't studying for drafting on your specific site.

Now, one of the coolest things about our  fantasy football draft kit is that it's easily customizable. If you set it to Yahoo's default league settings, then you can compare our rankings to what you see in a live draft application. Don't worry. I had the foresight to do that already.

One major variable with Yahoo's default league settings is that you start three wide receivers. There is is no flex position if you join a public league or leave your settings to the default ones. So your need for wide receivers grows compared to leagues in which you can start three running backs (if you choose to start one at the flex position). Then again, there are no points for receptions, so how does that factor in?

Our FireFactor scores have you covered. FireFactor it will help identify which positions -- and players -- are most important given your league settings.

Let's break this down.

Fundamental Differences

1. Yahoo starts three wide receivers. I mentioned this already, but it really does shift how you should approach your draft, provided that your commissioner doesn't customize your league on Yahoo.

2. We value mid-range wide receivers more than their draft list. This means that you can find value if you wait on wide receiver a bit -- but again, don't get caught with two quarterbacks before you have a solid wide receiver base or anything like that.

3. Don't get sucked into the tight end rankings. We know from our FireFactor series that tight ends are the least valuable position in most scoring formats. Yahoo lists plenty of them pretty early, but we wouldn't advise taking them at those costs.

4. You'll be fine if you wait on quarterback. There are plenty of good options you can get late in your drafts. Don't panic!

Overvalued Yahoo Players According to Our Projections

I'm going to hit you with some tables of notable players with some pretty big discrepancies between our ranks and what you'll see in your Yahoo draft -- which will change as we get closer to the season. That's why you should stay up to date with player updates.

Here are some players at the onesie positions that we think are overvalued based on where you'll find them in your Yahoo draft app.

Those are some pretty big names, and it includes the top three tight ends -- Rob Gronkowski, Jimmy Graham, and Travis Kelce. Nothing against those guys, but the importance and replaceability of the position limits their value in this type of league setup.

Same goes for a fair number of high-profile quarterbacks, including Andrew Luck. It's not that we don't see the importance of the quarterback in this setup -- we do, and you'll see two big names who are undervalued by a full round (based on 12-team settings) in just a second -- but the suggested draft slot for a few of these quarterbacks can cause you to miss out on some better picks in the same range.

What about backs and receivers?

Really, it was hard to identify many overvalued players at running back and receiver because these positions are the most vital in this format. This certainly isn't an avoid-at-all-costs list but rather a list of a few unproven players with more question marks than are baked into their Yahoo rank.

We  just don't know as much about plenty of upside but plenty of question marks as well. And now that his inefficiencies might get the best of him as a sophomore.

We see them all as top-100 players even with those concerns, but there are also plenty of undervalued receivers you can get at a discount.

Undervalued Yahoo Players According to Our Projections

But first, the tight ends and quarterbacks.

Oh, look, there's upside and opportunity, then check out just as capable.

Oh, plus a steal for the second year in a row. And don't be one of the people who are undervaluing Green Bay's Markus Wheaton (221st), Devin Funchess (226th), and Matt Jones (246th), who might have an outside shot at third-down duties in Washington. For being ranked 2,081st overall, that's not half bad.