A step-by-step playbook for commissioners building a premium Sleeper lock-in basketball league from scratch.
Setting up a Sleeper lock-in basketball league is straightforward, but the decisions you make during setup determine whether the league thrives or fades by February. This step-by-step guide walks commissioners through every setting in the order you will face it — from first screen to draft day — so nothing falls through the cracks.
Setting up a lock-in league on Sleeper is straightforward, but the choices you make in setup determine whether the league thrives or fades by February. This guide walks through every decision in the order you will face it, from the first screen in the app to the moment your managers finish the draft.
Before touching any settings, it is worth understanding what you are building and why it is a step above the traditional daily-lineup grind. In a standard fantasy basketball league, managers are expected to set a full active lineup every single night. The NBA plays 82 games across six months, spread across most nights of the week. That is a relentless management burden that causes burnout, drops engagement, and pushes quality managers toward formats with less friction.
Lock-in changes the equation. Instead of managing a full lineup each night, managers select which player performances they want to lock in for their matchup, committing to that score once the game tips off. The timing, the game selection, and the strategic reads all become part of the skill. It is far more interactive than traditional daily lineups, and far less tedious.
The honest caveat: lock-in still requires involvement. You are still watching games, still making real-time decisions, still monitoring a long season. It is not zero-maintenance. If true zero-maintenance is the goal, best ball is the answer. But for managers who want to stay in the game and feel their decisions matter nightly, lock-in is the right format, and it is worth building properly.
The Sleeper app (iOS, Android, and web at sleeper.com) is the only platform this guide applies to. Lock-in mode is a Sleeper-native format and is not available anywhere else. Start by opening the app, navigating to the Leagues section, and selecting Create League. You will be prompted to choose a sport (Basketball / NBA) and a season type.
Name the league something that signals premium. A clean, specific name sets the tone before a single manager joins. Avoid placeholder names like "My Hoops League" because that first impression sticks and signals the commissioner's commitment level. Give it a real name before you send the invite link.
Complete every setting before sending invites. Managers who join before settings are finalized may make roster or draft prep decisions based on incomplete information, and changing rules after people have committed creates friction and erodes trust from day one.
You will be asked to choose public or private. For a premium vetted league, always choose private. Public leagues surface your league to random joiners and undermine the vetting process that keeps quality managers in the room. A private invite link means only the managers you personally approve can join.
Twelve teams is the gold standard for dynasty basketball. It is large enough to make the talent pool feel competitive and scarce, small enough that every manager can build a coherent identity. Ten teams is workable, fourteen is possible, but twelve is where the format shines.
For roster construction, a standard starting point looks like this:
| Slot | Count | Notes |
|---|---|---|
| PG | 1 | Point guard only |
| SG | 1 | Shooting guard only |
| SF | 1 | Small forward only |
| PF | 1 | Power forward only |
| C | 1 | Center only |
| G | 1 | Any guard eligible |
| F | 1 | Any forward eligible |
| FLEX | 2 | Any position |
| Bench | 5 | Standard bench depth |
| IR | 2 | Injured reserve slots |
That gives you 9 starters and 7 non-active slots, for a total roster of 16. The FLEX spots are important in lock-in specifically because they give managers flexibility when deciding which performances to commit. Too few flex spots punish positional scarcity. Too many dilute the scarcity that makes the draft matter. Two FLEX spots is the right balance for a 12-team league.
IR slots matter more than beginners expect. The NBA season is long and injuries are constant. Without IR spots, managers are forced to drop injured stars to stay functional, which creates a waiver-wire arms race that advantages the most active managers over the most skilled ones. Two IR slots is standard; three is reasonable for a deep dynasty league.
Lock-in mode is set under the lineup and scoring settings in the league creation flow. Sleeper labels it clearly, and the toggle moves you from the traditional daily-lineup system to the lock-in format. Once enabled, the rules of lineup management change fundamentally.
In lock-in mode, managers do not set a full lineup each night. Instead, for each matchup period, they select individual player games to lock in. When a player's game tips off, the lock-in window closes for that game. The score from that performance is captured for the matchup. Managers continue locking in performances throughout the scoring period, building their matchup total game by game.
The strategic layer shifts from "which players are healthy tonight" to "which matchups, which opponents, and which nights produce the highest expected scores." Managers who understand schedule density, opponent defensive ratings, and game-time decisions gain a real edge.
Sleeper lets you configure how many lock-ins are required per scoring period, whether managers must use a minimum number of performances, and how tie-breaking works. Review each of these settings and document them in your league constitution before the draft. Managers should know exactly how many lock-ins are required, what happens if they miss a lockable game, and how scoring periods are counted.
Lock-in mode works with a points-based scoring system. You assign a point value to each stat category and the manager who accumulates the higher total in the scoring period wins the matchup. Here is a baseline H2H Points configuration that balances scoring volume with defensive value:
| Stat | Points | Rationale |
|---|---|---|
| Field Goal Made | +2.0 | Rewards efficiency, not just volume |
| Field Goal Missed | -1.0 | Penalty keeps high-volume scorers honest |
| 3-Pointer Made | +1.0 bonus | Extra value for perimeter shooting |
| Free Throw Made | +1.0 | Standard value |
| Free Throw Missed | -1.0 | Keeps FT% relevant |
| Rebound | +1.25 | Slightly elevated to value big men |
| Assist | +1.5 | Elevated to reward playmakers |
| Steal | +2.0 | High value for rare defensive stat |
| Block | +2.0 | High value for rare defensive stat |
| Turnover | -1.5 | Significant penalty, usage-adjusted |
These values are a starting point, not law. Your manager pool may prefer lighter shooting penalties, higher assist values, or different turnover weighting. Run your scoring settings by two or three trusted managers before finalizing them, because scoring adjustments after the draft are nearly impossible to make fairly. What matters most is that the values are decided, documented, and communicated before a single player is drafted.
The startup draft is the founding moment of a dynasty league. Getting it right matters more than almost any single decision after it. There are two main choices: format and pace.
Snake vs Auction: A snake draft reverses the order each round, so every manager gets early picks. It is simple, fast, and easy to explain to new managers. An auction draft gives everyone a budget (typically $200) and lets them bid on any player, which rewards preparation and creates a more even starting point. Both work well in dynasty, but snake is easier to run for a league's first startup, and it minimizes the risk of a new manager making an expensive mistake they cannot undo.
Live vs Slow Draft: A live draft runs in real time, with every manager present simultaneously. A slow draft (typically 8 to 12 hours per pick) lets managers take turns asynchronously over days. For a first-year premium league, a live draft is strongly preferred. The shared experience builds community, creates energy, and signals to every manager that this league is serious. Slow drafts are a fallback for leagues where scheduling a real-time window is impossible.
Schedule the live draft at least three weeks before the NBA season opener. This gives managers time to prepare, handles any technical issues, and allows waiver claims and roster setup before the first games tip. A rushed draft is the single most common reason first-year leagues feel disorganized.
For dynasty, the startup draft is typically 15 to 20 rounds, covering every active roster spot plus a handful of speculative bench picks. Set the draft order using a randomizer and publish it to all managers before draft day. No surprises in the order.
The league constitution is the document that keeps the league alive. Without it, disputes become personal, edge cases become crises, and the manager who was never going to last anyway has a platform to cause damage on his way out. A written constitution removes ambiguity, establishes precedent, and signals to every manager that you are running a serious operation.
A minimum-viable constitution for a lock-in dynasty basketball league should cover:
The trade review process deserves special attention in lock-in leagues because active managers will be trading with active managers, and the talent gap between engaged and disengaged managers can widen quickly. A 48-hour review window with a simple majority veto is a clean, minimal standard. Anything shorter creates chaos; anything longer kills momentum.
For the full commissioner methodology and vetting framework, see the premium league playbook.
The single biggest factor in whether a lock-in dynasty league survives its first season is manager quality. A great scoring system, a well-written constitution, and a clean draft mean nothing if half your managers disappear by December. Vetting is not optional for a premium league. It is the foundation.
Start with your existing network. Managers who already know you, know the format, or come recommended by a current manager are far more likely to stay active and engaged. Cold invites from Discord servers or social media can work, but they require a more rigorous screening process.
The full vetting framework, including manager profile questions, red flags, and how to handle a last-minute dropout, is covered in the run a dynasty basketball league guide. Use it before you open your invite link.
The weeks between inviting managers and running the draft are your biggest opportunity to build the culture that will carry the league through a six-month season. Silence in this window is a missed opportunity. Active commissioners build energy before the first pick is made.
A standard pre-draft communication sequence looks like this:
The tone of your pre-draft communications sets the tone for the entire season. Be clear, be organized, and be enthusiastic. Managers take their cues from the commissioner. If you show up with energy and precision, they will too.
Draft day is the league's formal launch. Everything before it is setup; this is the moment the league becomes real. A smooth draft creates a memory that managers reference for years. A chaotic draft creates doubt about whether the league is worth their continued investment.
The philosophy that holds all of this together is the same one that drives every league we run at No Guts No Glory: build the best roster and do not babysit lineups every night. Lock-in is the format that keeps managers in the game without turning the NBA season into a part-time job. Set it up right and it runs like that from opening night through the championship.
A 20-plus-year fantasy veteran and Diamond-level Yahoo manager, LordSkunk has competed at the highest levels since 2005 before going all-in on dynasty. He founded No Guts No Glory to build the premium dynasty experience he always wanted, and now commissions its football, basketball, and baseball leagues while streaming drafts and analysis across YouTube, Twitch, and Kick.
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