Keeper leagues add the best decision in fantasy football to your offseason: which players do you hold onto, and at what cost? Get it right and you start the season with an edge no one else has. Get it wrong and you've burned a high pick on a player you could have re-drafted later anyway.

This guide gives you a clear, repeatable way to value keepers.

How Keeper Leagues Work

In a keeper league, you carry over one or more players from last season into this year's draft, usually at the cost of a draft pick. The exact rules vary, but the most common structures are:

Round-cost keepers: you keep a player by giving up a draft pick in a set round — often the round you drafted them in, or one round earlier each year you keep them.
Fixed-round keepers: every keeper costs the same pick (for example, all keepers cost a 3rd-round pick).
Auction keepers: you keep a player by paying their salary, sometimes with an annual raise.

Whatever the format, keeper value comes down to one comparison: is this player worth more than the pick you're spending to keep him?

The Core Principle: Value Over Draft Cost

A keeper is good value when the player would be drafted earlier than the round he costs you. The bigger that gap, the better the keeper.

Think of it as a discount. If a player is going in the 2nd round of redraft leagues this year, and you can keep him for a 6th-round pick, you're getting a 2nd-round player at a 6th-round price — a four-round discount. That's an excellent keeper.

If that same player costs you a 2nd-round pick to keep, there's no discount at all. You'd be keeping him for exactly what he's worth, which means you've gained nothing over simply drafting at that spot.

A Simple Keeper Valuation Framework

For every keeper candidate, work through four steps:

1. Find the player's current redraft ADP. Look up where the player is being drafted in standard redraft leagues this year — his average draft position (ADP) tells you his real market value heading into the season. Use this year's ADP, not last year's results.

2. Identify your keeper cost. Determine exactly which round (or salary) it takes to keep him under your league's rules.

3. Calculate the gap. Subtract the keeper cost round from the ADP round. A player with a 3rd-round ADP kept for a 9th-round pick has a six-round gap.

4. Rank your candidates by gap. Keep the players with the largest positive gaps first. A two-round discount on a stud can be better than a five-round discount on a player you don't trust.

The keeper value calculator does this comparison for you — it weighs a player's projected value against the pick you'd spend.

Adjust for Risk and Position

The gap is the starting point, not the final answer. Two adjustments matter:

Age and durability. A 24-year-old with a four-round discount is a far safer keep than a 31-year-old running back with the same discount. Running backs especially can fall off a cliff — be cautious keeping older backs even at a good price.

Position scarcity. A discount on an elite quarterback matters more in superflex leagues, where QBs are scarce, than in single-QB leagues. Weigh the discount against how hard the position is to replace in your format.

Common Keeper Mistakes to Avoid

Keeping last year's points leader regardless of cost. A player who finished as the RB1 but costs you a 1st-round pick to keep is not a good keeper — you'd draft a similar player at that spot anyway. Production last year is not the same as value this year.

Falling for the name. Reputation lags reality. A former star whose role has shrunk is worth his current ADP, not his career-best season.

Ignoring the opportunity cost of the pick. Every keeper costs a pick you can't use on a fresh player. If your keeper saves you a 9th-rounder, you've also lost a 9th-round selection. Make sure the player clears that bar comfortably.

Keeping too conservatively. Some managers keep a safe, boring player when a higher-upside option at the same cost is available. The discount is what matters — chase the biggest edge.

How Many Keepers Should You Keep?

If your league lets you keep multiple players, you don't have to fill every slot. Only keep a player if he clears the value bar. An empty keeper slot returns a draft pick you can use freely — that's often better than keeping a marginal player just because you can.

Frequently Asked Questions

How do you decide if a keeper is worth it?

Compare the player's current redraft ADP to the draft pick he costs you. If he'd be drafted earlier than that pick, he's worth keeping — and the bigger the gap, the better the value.

Should I keep my best player no matter what?

Not if the cost is too high. A great player kept at his actual draft-round value gives you no edge. Keep players who come at a discount to their market price.

Do keeper rules change how I value players?

Yes. Round-cost, fixed-round and auction-salary formats all change the math. Always value a keeper against the specific cost your league's rules attach to him.

Is it better to keep a young player or a proven veteran?

At a similar discount, lean young — especially at running back, where older players carry more injury and decline risk. Veterans are fine keepers when the discount is large enough to offset the risk.

Can I leave a keeper slot empty?

Yes, and you should if no player clears the value bar. An unused keeper slot returns a draft pick, which is often more valuable than keeping a marginal player.

How to Value Keepers in Fantasy Football