The Celtics are looking to advance to the NBA Finals for a second straight year. But first they need to avoid an 0-2 hole in the Eastern Conference Finals. Where do Celtics backers start when they're looking to bet on Game 2? While all of the betting apps will give them sign up bonuses to build their bankroll, which are really the best?

That's were we come in. We've made it simple for you: a list of the top Massachusetts sportsbook promo codes and everything that comes along with it after you register for a new account at the specific operator. 

And remember, you can sign up at as many Massachusetts betting apps as you want, so pick and choose ALL that are right for your specific betting style and strategy. Here’s what you need to know:

BetMGM Massachusetts Celtics Betting Promo

Bettors who use the BetMGM Massachusetts bonus code BOOKIE200 during registration will unlock a Bet $10, Get $200 in bonus bets when they bet on the Celtics, or another NBA team's moneyline.

You'll get $200 in bonus bets - regardless of the outcome of your wager. You'll get 4 $50 bonus bets that expire in seven days (they have no cash value). This deal is also valid for the Red Sox (BetMGM Mass bonus code BOOKIES200).

If you don't want to use that offer, the BetMGM Mass bonus code BOOKIES unlocks a first-bet bonus up to $1,000—meaning your first wager will either earn you cash profit (if it wins) or matching bonus bets back to you (if it loses). 

It’s a great deal for all types of bettors, who will receive five bonus bets in equal 20% denominations of their losing wager as part of the welcome bonus (for example, a losing $600 wager would yield five $120 bonus bets). Note that bettors who originally wager less than $50 and lose will simply receive a single matching bonus bet. No matter what you play to wager with that first play, you’re in good shape with BetMGM Massachusetts.

Click the BET NOW button below to begin your BetMGM Massachusetts experience and earn your bonus bets.

$1,000 First Bet on Caesars

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Used 34 Times Today

MA only. 21+. Gambling Problem? If you or a loved one is experiencing problems with gambling, please call 1-800-327-5050 or visit gamblinghelplinema.org for 24/7 support. LiveChat with a GameSense Advisor at GameSenseMA.com or call 1-800-GAM-1234

Up to $1,500 in Bonus Bets if Your First Bet Loses Promo Code: BOOKIES

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Used 12 Times Today

Bonus Bets Expire in 7 Days. One New Customer Offer Only. Must be 21+ to participate & present in OH. In partnership with MGM Northfield Park. Gambling problem? Call 1-800-GAMBLER. Visit BetMGM.com for T&Cs. US promotional offers not available in NY, NV, or Puerto Rico.

Caesars Massachusetts Celtics Betting Promo

It doesn’t get any bigger on this board or in the Bay State than the Caesars Sportsbook Massachusetts promo code BOOKIESFULL. Players who register for a new account will receive first-bet insurance up to $1,250. 

You don’t need to bet the full amount, of course, but it’s a good idea to maximize this one-time offer as high as you can. It means you’ll either earn cash profit on a winning bet like you would traditionally, or earn a single matching bonus bet if your bet loses. 

It’s essentially giving losing bettors a second chance to get their bets correct all because they used the Caesars Sportsbook promo code BOOKIESFULL when registering for an account. It's the kind of offer we expect from one of the biggest operators in Massachusetts.

$1,000 First Bet on Caesars

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Used 72 Times Today

OH only. 21+. New users and first wager only. Must register with eligible promo code. Bet amount of qualifying wager returned only if wager is settled as a loss. Maximum bet credit $1,000; must be used within 14 days of receipt. See Caesars.com/promos for full terms. Void where prohibited. Know When To Stop Before You Start.® Gambling problem? Call 1-800-GAMBLER

WynnBET Massachusetts Celtics Betting Promo

Bet $20, get $100. It doesn’t get much simpler than the WynnBET Massachusetts promo code XBDC. New bettors who register for an account and place a $20 real-money wager on any set of odds -120 or greater will automatically earn a $100 bonus bet—on top of any potential winnings off their original wager. 

It’s a steeper requirement upfront, but it also means higher potential payouts and the chance to win your original bet AND earn the bonus bet. Another requirement is that the bonus bet must be used on odds of -150 or greater, but there will always be hundreds of betting options at WynnBET Massachusetts that will qualify. 

$1,000 First Bet on Caesars

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Used 23 Times Today

MA only. 21+. Gambling Problem? If you or a loved one is experiencing problems with gambling, please call 1-800-327-5050 or visit gamblinghelplinema.org for 24/7 support. LiveChat with a GameSense Advisor at GameSenseMA.com or call 1-800-GAM-1234

DraftKings Massachusetts Celtics Betting Promo

It’s always nice to know that no matter what happens, bonus bets are coming your way. That’s why the DraftKings Massachusetts promo code offer has become so popular in the Bay State. Bettors who register for a new account and place a $5 wager on any pregame moneyline will automatically earn $150 in bonus bets. 

These are dispersed as six $25 bonus bets so new players can test out different bet types and markets as they’re getting introduced to sports betting, and they can also earn cash profit on that original moneyline wager. That potential for a double dip and the unlimited access you receive to DraftKings Massachusetts makes this a great deal for all types of players.

$1,000 First Bet on Caesars

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Used 59 Times Today

MA only. 21+. Gambling Problem? If you or a loved one is experiencing problems with gambling, please call 1-800-327-5050 or visit gamblinghelplinema.org for 24/7 support. LiveChat with a GameSense Advisor at GameSenseMA.com or call 1-800-GAM-1234

FanDuel Massachusetts Celtics Betting Promo

Guarantees don’t come around very often when it comes to online sports betting (after all, you’re making bets). But the FanDuel Massachusetts promo code offer does exactly that: New players who register for an account and place a $5 real-money wager on any set of odds will receive $150 in site credit. 

It’s really that simple. The added bonus with this versatile offer is that the site credit that bettors receive can be split up and used however they decide. It’s the only offer on this board that has that feature, making it a great deal for all types of bettors (who can also earn cash profit on that original bet that unlocks the bonus).

Hit BET NOW on the link below to qualify for this offer and to start your FanDuel Massachusetts experience.

Bet $5, Get $150 in Bonus Bets

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Used 8 Times Today

Must be 21+ and present in OH. Gambling Problem? Call 1-800-GAMBLER.