RB Depth Strategy in Best Ball: How Many Running Backs to Draft and Why
In managed redraft, you can pick up the handcuff when your starter is injured, stream a RB on a good matchup, or add a committee back when the starter goes down. In best ball, none of those options exist. Your RB room is locked at the draft. This changes how many RBs you need and which types deliver value.
Best Ball RB Quick Reference
| RB type | Best ball value | When to target | What to avoid |
|---|---|---|---|
| Bellcow in a run-first offense | Highest — reliable auto-set starter every week | Rounds 1–4; pay up if clearly the team’s feature back | Bad offensive line; inconsistent carry share |
| Pass-catching RB | High — receptions floor out weekly scores in PPR; on field more in passing game | Rounds 3–8 depending on role clarity | Teams that rarely target RBs in the passing game |
| High-upside committee back | Moderate — boom-or-bust but worth late-round lottery investment | Rounds 8–12 in productive offense with split carries | Committees in bad offenses or constant trailing game scripts |
| Pure handcuff (no independent role) | Zero — only produces when starter is injured; timing is unpredictable | Never in best ball — hold only if drafting a known elite handcuff very late | Any significant draft capital |
The Best Ball RB Problem
You benefit from RB depth, not just RB quality. If your top RB has an off week (poor game script, inefficient performance) but your second RB blows up, the auto-set captures the best performance. A deep RB room that produces across multiple players is more valuable than a single elite RB and four backups.
Injured RBs are dead weight. If your RB1 tears his ACL in Week 4, he scores zero for the rest of the season and occupies a roster spot you cannot fill. In managed redraft, you drop him and add a replacement. In best ball, you drafted him and he is done.
How Many RBs to Draft
Standard approach (5–6 RBs): In a typical best ball roster of 18–20 players, most experienced managers draft 5–6 RBs:
- 2 early RBs (Rounds 1–6) who are clear starters with significant roles
- 1–2 mid-round RBs (Rounds 7–10) with upside or committee potential
- 1–2 late-round RBs (Rounds 11–15) as speculative ceiling plays or cheap volume plays
This provides: coverage if 1–2 early RBs are injured; multiple RBs with weekly upside; late-round lottery tickets in case a committee back emerges.
WR-heavy approach (3–4 RBs): Minimize RB investment and load up on WRs, accepting that RBs are less predictable and more injury-prone. This frees additional early and mid-round picks for the more stable WR position. The tradeoff: if both early RBs underperform or get injured, there is less depth to compensate.
When to Stop Drafting RBs
In best ball, RB value diminishes sharply after the first few rounds because players available in Rounds 10–15 are mostly backup or committee situations.
The principle: stop drafting RBs when the marginal RB on the board is worse than the marginal WR on the board.
Example: Round 10. The best available RB is a committee back with 30% of carries who might hit 15 points in a good week. The best available WR is a clear WR2 on a pass-heavy team with 18%+ target share. The WR has more consistent weekly upside. Take the WR.
The exception: if you have only 3 RBs and injury variance concerns you, one more mid-round RB with some upside is defensible insurance.
RB Depth as Best Ball Insurance
You need RBs to start every week for 17 weeks, and RBs have the highest injury rate of any skill position. Having 6 RBs instead of 4 means that when two of them go down to injury (which is likely over 17 weeks), your auto-set still has viable RBs to deploy. Having 4 RBs and watching two of them go on IR in Weeks 1–3 leaves you RB-deficient for the rest of the season with no waiver fix.
The counter: investing in RB depth costs you WR picks in the middle rounds, and WRs are generally more reliable and consistent producers. The optimal balance depends on your view of how much RB injury risk you want to absorb.
For how RB depth strategy fits into overall best ball roster construction, see: Best Ball Fantasy Football Draft Strategy: How to Build a Winning Roster. For how running back value compares to WR value in the best ball scoring context, see: Running Back Value in Best Ball: How RBs Fit Into the Format.