SleeperPy

What are tiers and how do they work?

Tiers are groupings of players based on expert consensus rankings, created by Boris Chen. Players in the same tier are expected to perform similarly that week. For example, all Tier 1 QBs are roughly equivalent, and significantly better than Tier 3 QBs.

The key insight: within the same tier, the difference between players is small. Between tiers, the difference is meaningful. This helps you avoid agonizing over choices between similarly-ranked players.

How do I find my Sleeper username?

Open the Sleeper app, go to Settings (gear icon), and look for your username near the top of the page. It's the name that starts with @. Enter it without the @ symbol.

For more details, see Sleeper's account settings guide.

How often do tiers update?

Boris Chen's tiers are updated weekly during the NFL season, typically by Wednesday. SleeperPy caches tier data for 15 minutes, so you'll see updates shortly after they're published.

During the offseason, tiers may not be available. Dynasty features (player values, trade targets, etc.) are available year-round.

What's the difference between Standard, Half PPR, and PPR?

These are scoring formats that affect how players are ranked:

• Standard — No points per reception
• Half PPR — 0.5 points per reception
• PPR — 1 point per reception

SleeperPy automatically detects your league's scoring format and uses the appropriate tier rankings. PPR leagues value pass-catching players (especially WRs and pass-catching RBs) more highly.

What is dynasty mode?

Dynasty mode provides analysis tools for dynasty (keeper) leagues where you keep players across seasons. It includes:

• Dynasty values — Long-term player valuations from DynastyProcess
• Draft capital tracking — See which draft picks you own across future years
• Trade targets — Find teams with complementary positional needs
• Breakout candidates — Young bench players with high upside
• Aging player alerts — Players approaching decline age thresholds
• League power rankings — Compare your team's value and record against the league

Dynasty mode is automatically enabled for leagues detected as dynasty format.

How are dynasty values calculated?

Dynasty values come from DynastyProcess, which aggregates multiple dynasty ranking sources. Values are on a 0-10,000 scale and are updated regularly.

For superflex leagues, 2QB values are used which value QBs more highly. For standard leagues, 1QB values are used.

What do the colored indicators mean?

• ★ Gold star — Tier 1 player (elite)
• Green highlight — Free agent upgrade available
• Red highlight — Starter with a better bench alternative
• Blue FLEX badge — Player ranked using FLEX tier
• ⇄ Swap icon — Bench player better than a current starter

Why don't I see my league?

Possible reasons:

• Your league may not have started yet for the current season
• You may have entered the wrong username (check capitalization)
• The Sleeper API may be temporarily unavailable
• Non-dynasty leagues require active matchups to display

Dynasty leagues are visible even during the offseason when there are no active matchups.

How do I report a bug or request a feature?

Please open an issue on GitHub. Include as much detail as possible: your username, league name, what you expected vs what happened.