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Week 11 DraftKings Monday Night Football Showdown: San Francisco 49ers vs. Arizona Cardinals

Inglewood, California, USA; Arizona Cardinals quarterback Colt McCoy (12) during pregame warmups before an NFL game GAINSAT THE against the Los Angeles Rams at SoFi Stadium. Mandatory Credit: Robert Hanashiro-USA TODAY Sports

Estimated reading time: 6 minutes

This season, we'll analyze all of the NFL’s “island” games (TNF, SNF and MNF) and playoff matchups, utilizing PFF’s weekly projections, current betting lines and millions of simulated historical combinations to identify the best and worst values for an upcoming matchup.

There are five main components to this Showdown slate analysis that you’ll find below:

  • A breakdown of methodology and the most similar historical matchup to this game: 2021 Week 19: New England PatriotsMiami Dolphins, with Mac Jones playing Jimmy Garoppolo‘s role and Tua Tagovailoa as Colt McCoy.
  • Optimal lineup allocations (CPT and total roster) for both teams based on the results of similar historical matchups.
  • Comparison of player ownership projections for FLEX and CPT produced by a model trained on 2018-2022 Showdown contest results to optimal allocations.
  • Recent CPT ownership trends are illustrated for both starting lineups.
  • A table showing the most common players on optimal lineups for each player. This allows you to see which other players are commonly found on the same optimal lineups as a player you’re interested in rostering.

Methodology

To analyze this specific Showdown slate, I looked through thousands of NFL matchups from 2014 to 2022 and found the closest analogies to this contest according to the following parameters: Betting spread, over/under and average fantasy points scoring for the top-ranked positional players of both rosters (QB1, RB1, WR1, TE1).

I won’t detail every matchup that falls into the top 100 for this game, but for illustration purposes, let’s look at the most similar matchup:

Historical Current
Player Pos Team Player Pos Team
Mac Jones QB NE Jimmy Garoppolo QB SF
Damien Harris RB NE Christian McCaffrey RB SF
Jakobi Meyers WR NE Deebo Samuel WR SF
Hunter Henry TE NE George Kittle TE SF
Tua Tagovailoa QB MIA Colt McCoy QB ARI
Duke Johnson Jr. RB MIA James Conner RB ARI
Jaylen Waddle WR MIA DeAndre Hopkins WR ARI
Mike Gesicki TE MIA Trey McBride TE ARI

The spread and over/under are similar in these matchups (Patriots -5.5, 41 O/U versus this matchup at 49ers -8, 43.5 O/U). All the players aren’t perfect matches, but that’s why we use 100 similar matchups and not just the single most similar.

The optimal roster for that historical matchup, assuming positional salaries equaled what they are for this showdown slate, would have been:

Player Team Position Roster Position Fantasy Pts
Duke Johnson Jr. MIA RB CPT 22.2
Brandon Bolden NE RB FLEX 20.6
Dolphins MIA DST FLEX 20.0
Damien Harris NE RB FLEX 17.3
Jaylen Waddle MIA WR FLEX 13.7
Hunter Henry NE TE FLEX 13.6

For this game and 99 other similar matchups, I calculated every possible combination that fits with Showdown rules (one CPT, at least one offensive player from each team) and would fall under the $50K salary threshold, assuming the salaries for the historical similar matchups are the same as those for this contest.

Choosing the right captain

The most unique part of the format, and therefore the biggest opportunity for a competitive advantage, is choosing your CPT. Should you always choose a QB who typically has the highest absolute fantasy scoring? Are defenses and kickers viable options? RB versus WR?

I went through the millions of possible lineup combinations for the 100 most similar matchups and found who the CPT selections were on the top-five scoring lineups for each matchup. Here are the 500 CPT choices from those matchups by position rank according to salary.

Breaking down total optimal rosters

This graph illustrates the full range of allocations for the different positions to measure how many of the 500 optimal rosters had exactly zero, one or two of the given positions.

Historical ownership

The boxplot above shows the ranges for CPT ownership for each starting player in contests since 2019.

Projected ownership versus optimal

This is where the analysis comes together and becomes actionable. What’s most important when viewing these numbers is to contrast them to the optimal numbers taken from the analysis above for different positions. Then, we see where the leverage may exist.

The two tables below compare the optimal allocations above, with adjustments for the personnel of this particular matchup, to our ownership projections for CPT and FLEX.

DraftKings showdown captain

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