The Celtics entered Game 4 of the NBA Finals Friday night looking to become just the 10th team to sweep a finals but instead, the seemingly disinterested team was embarrassed by the Mavericks, losing 122-84 in the third biggest finals blowout in NBA history. Maybe the idea was to win their record 18th title at TD Garden, and that’s where Game 5 will be Monday night. Bettors looking to get in on the action can wager on Game 5, the series, series futures, build parlays and bet on specials while taking advantage of some great Celtics betting promos and bonuses from the top Massachusetts betting sites that will give you guaranteed bonus bets, protected first bets and much more.

Best Celtics Betting Promos & NBA Finals Betting Bonuses

Best Celtics Betting Promos: Caesars Sportsbook Massachusetts Promo Code SBWIRE1000

If you’re as big a fan of high limits and protected first bets as you are of the Celtics, then you’ll like the welcome offer from Caesars Sportsbook Massachusetts, one of the best Celtics betting promos. When you start an account with the Caesars Sportsbook Massachusetts promo code SBWIRE1000, you seize a first bet up to $1,000 on Caesars.

If your first bet of at least $10 settles as a loss, you’ll get a bonus bet refunded to your account for the full amount of your lost wager. You have 14 days to play this bet credit from one of the best Celtics betting promos.

To turn your bet credit into cash with one of the leading Massachusetts sports betting apps, keep in mind Caesars Sportsbook (and the other online sportsbooks mentioned in this story) abide by a 1X playthrough requirement. This means your bet credit needs to win just one time for you to claim the profit in cash.

Best Celtics Betting Promos: Fanatics Sportsbook MA

One of the best Celtics betting promos gives Massachusetts sports bettors up to $100 a day in bonus bets for the first 10 days after you register for a new account. When you launch your account using the Fanatics Sportsbook promo, you can claim up to $1,000 in bonus bets – and you don’t even have to win a bet to do so.

Just make a qualifying first bet each day for 10 straight days and one of the leading Massachusetts sportsbook promo codes will give you a matching bonus bet. A qualifying offer is defending as your first wager of the day on odds of -200 or longer and between $5 and $100.

You will receive the bonus bets irregardless of the outcome of your first wagers and they expire after seven days. The 1X playthrough requirement means you can cash out any winnings.

Best Celtics Betting Promos: BetMGM Massachusetts Bonus Code SBWIRE

If you start an account using the BetMGM Massachusetts bonus code SBWIRE, one of the best Celtics betting promos, you’re guaranteed a protected first bet up to $1,500.

If your first bet of at least $10 wins, then cash winnings flow into your account. But if your first bet clangs off the rim, BetMGM grabs the offensive rebound and kicks it back out to you in the form of bonus bets. That’s the benefit of taking advantage of one of the industry’s best sportsbook promo codes.

How many bets? If your first bet was for $50 or more, you receive five bonus bets — each worth 20 percent of your original wager. If you bet less than $50, then you receive one bonus bet that equals your original wager.

You get seven days to play your bonus bets. As with all of the best Celtics betting promos, any bonus bet must win just one time for you to claim the profit in cash.

Best Celtics Betting Promos & Bonuses: DraftKings Massachusetts

If you set up a new account with the DraftKings Massachusetts promo code today, you’re assured of $150 in bonus bets the moment you make a $5 first bet. It doesn’t get any easier than this and it’s the kind of offer makes this one of the best Celtics betting promos.

As soon as you make a minimum $5 first bet, DraftKings sends you six $25 bonus bets. You’ll have seven days to play these bonus bets on any sport you find at DraftKings — one of the elite NBA betting apps. Each time one of your bonus bets with one of the best Celtics betting promos & bonuses wins, you reap the profit in cash.

Best Promos & Bonuses for Celtics Betting: FanDuel Massachusetts

You don’t have to pick and choose between these best Celtics betting promos. If you like them all, then you can sign up for them all. When it comes to FanDuel, if you register for an account with the FanDuel Massachusetts promo code, you’ll enjoy $300 in bonus bets if you make a winning first bet of $5 or more.

Once you win your $5 first bet, FanDuel sends you the $300 in site credit that will arrive within 72 hours. And here’s a cool wrinkle with the credit: FanDuel lets you decide how to split up that $300 Want to make one $300 bonus bet? Want to place three $100 bets? Whatever combination – FanDuel lets you be the boss.

The bonus credit from one of the best Celtics betting promos expire after seven days. Each time one of your bonus bets wins, the profit is all yours in cash.

Note that this offer is exclusive to bettors in Massachusetts as well as Ohio. Elsewhere, the FanDuel promo code offer is Bet $5, Get $200 if your first bet is successful.

Stock up on guaranteed bonus bets, high-limit bet protection and more when you sign up for one or more – or all – of the best Celtics betting promos. The NBA playoffs are a great time to start your sports betting journey. Sign up for your favorite offers now and begin betting today!

Use the Best Celtics Betting Promos to Wager on the NBA Finals

After 10 straight playoff wins – including every road game of the 2024 playoffs – the Celtics were due for a letdown. That it happened in blowout fashion in a potential championship-clinching game? That’s another thing. The Celtics led 11-10, and then never again as Dallas raced out to a 34-21 lead after one quarter that grew to 61-35 at the half. The Celtics trailed by 48 points at one point.

The Celtics shot just 36.3 percent from the field. Jason Tatum had 15 points on 4-of-10 shooting while Jaylen Brown was 3 for 12 from the field and had 10 points.

The good news is, NBA betting sites see Game 4 as an aberration, and the Celtics are solid -300 pick over the Mavericks (+230) in the Game 5 NBA odds at BetMGM on Monday night.

You can wager on Game 5, player props, specials and much more with the best Celtics betting promos and bonuses available on the NBA betting sites mentioned above. And you can get in on the action as the Celtics chase title No. 18.

2024 NBA Finals Schedule

• Game 1 | June 6: Celtics 107, Mavericks 89
• Game 2 | June 9: Celtics 105, Mavericks 98
• Game 3 | June 12: Celtics 106, Mavericks 99
• Game 4 | June 14: Mavericks 122, Celtics 84
• Game 5 | June 17: Mavericks at Celtics, 8:30 p.m.
• Game 6 | June 20: Celtics at Mavericks, 8:30 p.m. *
• Game 7 | June 23: Mavericks at Celtics, 8 p.m. *

* if necessary