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Underdog Promo Code PROPS: Play $5, Get $75 in Bonus Entries for NBA Cup Finals

Justin Carlucci

Justin Carlucci

Last updated: December 18, 2025

NBA Games Christmas: Schedule, Odds, Preview for Thursday, 12/25

What’s good, Props fam! The NBA Cup Finals are here, and if you’re looking to build pick’em slips for tonight’s championship showdown between the Knicks and Spurs, the Underdog promo code makes it very easy to build a bankroll! New users can play just $5 with Underdog promo code PROPS to get $75 in bonus entries. 

Must be 18+ (19+ in AL, NE; 19+ in CO for some games; 21+ in AZ, MA, and VA) and present in a state where Underdog Fantasy operates. Terms apply. Offer not valid in MD, MI, NJ, NY, OH, and PA. Concerned with your play? Call 1-800-MY-RESET or 1-800-GAMBLER or visit www.ncpgambling.org; AZ: 1-800-NEXT-STEP (1-800-639-8783) or text NEXT-STEP to 53342; NY: Call the 24/7 HOPEline at 1-877-8-HOPENY or Text HOPENY (467369).

Below is everything you need to know about the Underdog bonus code, plus our complete breakdown of Knicks vs Spurs props, and more key info about tonight’s championship.

Check out some popular NBA Cup Finals props on Underdog:

Popular Underdog Props: Underdog Promo Code Dec. 16

Underdog Promo Code & Bonus Entry Offer

Play $5, Get $75 in Bonus Entries
Promo Code: PROPS
✅ $75 in Bonus Entries (basically free plays)
✅ 18+ to play (19+ in AL, NE; 21+ in AZ, MA, VA)
✅ Available in 40+ states

Must be 18+ (19+ in AL, NE; 19+ in CO for some games; 21+ in AZ, MA, and VA) and present in a state where Underdog Fantasy operates. Terms apply. Offer not valid in MD, MI, NJ, NY, OH, and PA. Concerned with your play? Call 1-800-MY-RESET or 1-800-GAMBLER or visit www.ncpgambling.org; AZ: 1-800-NEXT-STEP (1-800-639-8783) or text NEXT-STEP to 53342; NY: Call the 24/7 HOPEline at 1-877-8-HOPENY or Text HOPENY (467369).

How the Underdog Bonus Code Works

Check out this awesome welcome offer courtesy of Underdog! You can also see our full review of Underdog before you sign up!

  • Step 1: Enter Underdog promo code PROPS when you register at Underdog Fantasy
  • Step 2: Make your first deposit and play at least $5
  • Step 3: Bang (Mike Breen voice)! You get $75 in bonus entries instantly
  • Step 4: Use those $75 bonus entries to build pick’em slips with zero out-of-pocket risk

Your bonus entries are separate from your real money balance. You can build pick’em slips specifically with the $75 in free plays and see if you can turn it into actual winnings. No rollover requirement—just play and see what hits.

Important details:

  • Bonus entries expire 30 days after issuance
  • Must be 18+ (19+ in AL, NE; 21+ in AZ, MA, VA)
  • Available in 40+ states (NOT MD, MI, OH, PA)
  • Winnings from bonus entries are real money you can withdraw

Why this matters for tonight: You get $75 in free plays to test out Underdog’s pick’em slip builder on the NBA Cup Finals. No risk. All upside.

CLAIM YOUR UNDERDOG BONUS ENTRIES NOW!

Must be 18+ (19+ in AL, NE; 19+ in CO for some games; 21+ in AZ, MA, and VA) and present in a state where Underdog Fantasy operates. Terms apply. See assets.underdogfantasy.com/web/PlayandGetTerms_DFS_.html for details. Offer not valid in MD, MI, OH, and PA.

Must be 18+ (19+ in AL, NE; 19+ in CO for some games; 21+ in AZ, MA, and VA) and present in a state where Underdog Fantasy operates. Terms apply. Offer not valid in MD, MI, NJ, NY, OH, and PA. Concerned with your play? Call 1-800-MY-RESET or 1-800-GAMBLER or visit www.ncpgambling.org; AZ: 1-800-NEXT-STEP (1-800-639-8783) or text NEXT-STEP to 53342; NY: Call the 24/7 HOPEline at 1-877-8-HOPENY or Text HOPENY (467369).

NBA PLAYER PROPS LIVE ODDS

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Ausar Thompson
SG DET @ CLE
Today 7:00 PM ET
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Cade Cunningham
PG DET @ CLE
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Caris LeVert
SF DET @ CLE
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Daniss Jenkins
PG DET @ CLE
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Dean Wade
PF DET @ CLE
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Dennis Schröder
PG DET @ CLE
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Donovan Mitchell
SG DET @ CLE
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Duncan Robinson
SG DET @ CLE
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Evan Mobley
PF DET @ CLE
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Isaiah Stewart
PF DET @ CLE
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Jalen Duren
C DET @ CLE
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James Harden
SG DET @ CLE
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Jarrett Allen
C DET @ CLE
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Max Strus
SG DET @ CLE
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Paul Reed
PF DET @ CLE
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Sam Merrill
SG DET @ CLE
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Tobias Harris
SF DET @ CLE
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Anthony Edwards
SG SA @ MIN
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Ayo Dosunmu
PG SA @ MIN
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Carter Bryant
Carter Bryant
SA SF SA @ MIN
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De'Aaron Fox
De'Aaron Fox
SA PG SA @ MIN
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Devin Vassell
Devin Vassell
SA SG SA @ MIN
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Dylan Harper
Dylan Harper
SA PG SA @ MIN
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Jaden McDaniels
PF SA @ MIN
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Julian Champagnie
Julian Champagnie
SA SF SA @ MIN
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Julius Randle
PF SA @ MIN
Today 9:30 PM ET
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Keldon Johnson
Keldon Johnson
SA SF SA @ MIN
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Luke Kornet
Luke Kornet
SA C SA @ MIN
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Mike Conley
PG SA @ MIN
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Naz Reid
C SA @ MIN
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Rudy Gobert
C SA @ MIN
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Stephon Castle
Stephon Castle
SA SG SA @ MIN
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Terrence Shannon Jr.
SG SA @ MIN
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Victor Wembanyama
Victor Wembanyama
SA PF SA @ MIN
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Knicks vs Spurs NBA Cup Finals: Building Winning Pick’em Slips on Underdog

Tonight, we have New York (18-7) vs San Antonio (18-7) at T-Mobile Arena in Las Vegas. Knicks -2.5, total 234.5. Let’s dig into more important information.

NBA Cup Finals Game Info

  • Game: San Antonio Spurs (18-7) vs New York Knicks (18-7)
  • Time: 8:30 PM ET, Tuesday, December 16, 2025
  • Location: T-Mobile Arena, Las Vegas
  • TV: Amazon Prime Video
  • Spread: Knicks -2.5
  • Moneyline: Spurs +120, Knicks -140
  • Total: 234.5

What’s at stake: The NBA Cup championship trophy, bragging rights, and $500,000 per player for the winning team ($200,000 for the runner-up). This game doesn’t count in the regular season standings, but the competition is real.

How To Use Underdog Welcome Offer

Here’s the thing: Underdog lets you build Higher/Lower pick’em slips where you decide if a player will go over or under a stat total. These work exactly like player props at sportsbooks, but with a DFS-style twist.

How it works:

  • You pick if a player goes HIGHER or LOWER than their stat line
  • Single-entry picks pay 1x your entry (e.g., $100 entry = $100 profit)
  • Stack multiple picks together for multiplied payouts (2 picks = 3x, 3 picks = 6x, etc.)

Example for tonight: “Knicks control the paint, OG Anunoby dominates the glass, Jalen Brunson facilitates.”

How that builds on Underdog:

  • OG Anunoby HIGHER 4.5 rebounds
  • Jalen Brunson HIGHER 6.5 assists

That’s a coherent narrative, not random props. Each pick feeds the same story.

Best Underdog Props Tonight: Bonus Code Plays

Let’s jump into the good stuff!

OG Anunoby HIGHER 4.5 Rebounds

This is the anchor prop for any Knicks pick’em slip tonight.

OG Anunoby has been dominating the glass in the Knicks’ recent stretch. Over his last 5 games, he’s averaging 10 rebound chances per game—that’s elite volume for a wing player.

OG’s Recent Rebound Performance:

  • Dec 13 vs Orlando: 6 rebounds (40 minutes, NBA Cup semifinals)
  • Dec 9 @ Toronto: 6 rebounds
  • Dec 7 vs Orlando: 7 rebounds
  • Nov 9 vs Brooklyn: 8 rebounds
  • Nov 5 vs Minnesota: 8 rebounds

He’s cleared 4.5 rebounds in every single game in his last 5. Against a Spurs team that attacks the paint with Victor Wembanyama and Jeremy Sochan, the Knicks will need OG crashing the glass hard.

Stephon Castle HIGHER 17.5 Points

Here’s where sharp bettors are moving: Stephon Castle has seen massive usage since returning from injury for the Spurs.

Castle, San Antonio’s rookie guard, has been cooking lately. His usage rate has skyrocketed in recent games, and he’s expected to play heavy minutes in tonight’s NBA Cup Finals with Wembanyama commanding double-teams.

Castle’s Recent Scoring:

  • Averaging 15.1 PPG on the season
  • Posted 26 points on Nov 2 vs Phoenix
  • Posted 22 points on Oct 27 vs Toronto
  • Huge free-throw rate: 4.6 FTA per game (gets to the line consistently)

Against a Knicks defense that ranks middle of the pack in perimeter defense, Castle should see opportunity. If Wembanyama draws help defense in the paint, Castle gets clean looks from three and driving lanes.

Victor Wembanyama Props on Underdog

Wemby just returned from a 12-game absence due to a left calf injury and immediately went off in the semifinals: 22 points, 9 rebounds, 2 blocks in just 21 minutes against OKC.

The beautiful thing about playing on Underdog is that you DO NOT have to make a decison on anything Wemby-related.

Jalen Brunson Props on Underdog

Brunson has been elite in the NBA Cup run. He dropped a vintage performance in the semifinals against Orlando and is the Knicks’ primary offensive engine.

Brunson’s Season Stats:

  • Averaging 25+ PPG and 7+ APG
  • Elite free-throw rate
  • Thrives in big-moment games

He’s been such a great scorer that I’m leaning lower than 6.5 assists.

Good luck, and take advantage of this Underdog Promo Code!

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