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.
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:
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
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.
NBA PLAYER PROPS LIVE ODDS
| Player |
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De'Aaron Fox
SA
PG SA @ NY
Today
8:30 PM ET
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- | - | ||||||||
Devin Vassell
SA
SG SA @ NY
Today
8:30 PM ET
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- | - | ||||||||
Dylan Harper
SA
PG SA @ NY
Today
8:30 PM ET
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- | - | ||||||||
Harrison Barnes
SA
SF SA @ NY
Today
8:30 PM ET
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- | - | ||||||||
Jalen Brunson
NY
PG SA @ NY
Today
8:30 PM ET
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- | - | ||||||||
Jordan Clarkson
NY
SG SA @ NY
Today
8:30 PM ET
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- | - | ||||||||
Josh Hart
NY
SF SA @ NY
Today
8:30 PM ET
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- | - | ||||||||
Julian Champagnie
SA
SF SA @ NY
Today
8:30 PM ET
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- | - | ||||||||
Karl-Anthony Towns
NY
PF SA @ NY
Today
8:30 PM ET
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- | - | ||||||||
Keldon Johnson
SA
SF SA @ NY
Today
8:30 PM ET
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- | - | ||||||||
Luke Kornet
SA
C SA @ NY
Today
8:30 PM ET
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- | - | - | - | - | |||||
Mikal Bridges
NY
SF SA @ NY
Today
8:30 PM ET
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- | - | ||||||||
Mitchell Robinson
NY
C SA @ NY
Today
8:30 PM ET
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- | - | ||||||||
OG Anunoby
NY
SF SA @ NY
Today
8:30 PM ET
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- | - | ||||||||
Stephon Castle
SA
SG SA @ NY
Today
8:30 PM ET
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- | - | ||||||||
Tyler Kolek
NY
PG SA @ NY
Today
8:30 PM ET
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- | - | - | - | - | |||||
Victor Wembanyama
SA
PF SA @ NY
Today
8:30 PM ET
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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!
