Play $5 Get $75 Bonus on Cavaliers vs Bulls NBA: Use Underdog Code BTSLINES

Written By thelines.com | Published at December 15, 2025

We are nearing Christmas and the NBA regular season rolls on, and two teams who have been hit and miss are the Chicago Bulls and Cleveland Cavaliers. As it happens, these two Eastern Conference teams will be playing each other this week, and for the game, we’ve got a special BTSLINES promo code you can potentially use at Underdog. If you use this code when you sign up here, and then play with at least $5, you’ll unlock a massive $75 in bonus funds or free entries which you can then use for this game, or any of the other NBA action they support.

Play $5 in Fantasy Entries, Get $75 in Fantasy Bonus Entries

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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, NJ, NY, OH, and PA. Concerned with your play? Call 1-800-GAMBLER or visit www.ncpgambling.org; NY: Call the 24/7 HOPEline at 1-877-8-HOPENY or Text HOPENY (467369).

Bulls-Cavaliers Same Game Parlay Options

Cleveland should be winning this one. They have the stronger roster, and Donovan Mitchell has been on an absolute hot streak. However, they are still NOT the same team they were last year, and we could see the Bulls sneaking this one. Chicago did start the season off in amazing fashion, but since then, they’ve had a pretty big fall off and have come back down to earth. Whatever the outcome, Underdog will have a brilliant range of over/under Pick’em options for this game, including:

Josh Giddey over/under on assists or rebounds.
Nikolva Vucevic over/under in rebounds.
Donovan Mitchell over/under on points.
Darius Garland over/under on assists.

Creating Your New Underdog Account for NBA

The BTSLINES promo code can only be used if you are of legal gambling and and you have never registered an account with Underdog. Additionally, it’s available in all their supported states except MD, NJ, OH, and PA. To get started with Underdog and get your $75 in bonds funds or entries, you can do the following:

Tap our Underdog links.
Click the sign up button.
Complete the registration process.
Enter the BTSLINES promo code in the relevant box.
Finish the form.
Complete any initial verification.
Log in to your new account.
Make your first $5 play.

The registration process is easy and you’ll be able to get up and running in a few minutes - just make sure you enter the BTSLINES promo code. With your account made, you can check out the different competitions and Pick’em features Underdog has, including for the Chicago Bulls vs. Cleveland Cavaliers game. You just have to play with at least $5 to unlock your $75 in bonus funds or free entries.