Play $5 Get $50 Bonus on Celtics vs 76ers NBA: Use Underdog Code BTSLINES

Written By John Carlo Villaruel | Published at April 16, 2026

The Celtics and the 76ers will look to renew their rivalry as they meet this Sunday at the TD Garden for Game 1 of their best-of-seven first round series and the best part is Underdog gets you right in the middle of it. Simply apply our promo code BTSLINES when you register for an Underdog account and play at least $5 on any NBA contest you like. As a reward, we’ll drop $50 in bonus entries in your account so you can take part in this blockbuster Eastern Conference first round encounter which could very well come down into the waning seconds of the game.

Celtics-76ers Same Game Parlay Options

If their previous encounters are any indication, then we could be in for another grind-it-out type of matchup that skews toward quick defensive rotations and late-game shot creation. It can be recalled that three of the previous four matchups between the Celtics and the 76ers this season were decided by just two points or less. With both teams hoping to draw first blood in what could be a long seven-game series, there’s a huge chance that this could end up coming down to one final possession which is why I am avoiding the moneyline and spread action for this one.

Instead, I am playing the line on Tyrese Maxey to hit at least 30 points and pairing it with a double-double performance from Joel Embiid. Maxey has balled out whenever facing the Celtics this season with the two-time NBA All-Star averaging 30 points in their past four encounters. With the Celtics likely to zero in on Embiid, that should open up more aggressive scoring opportunities for Maxey, especially in transition. Speaking of Embiid, I am also liking the former league Most Valuable Player to record a double-double here given that the Celtics are spread too thin in the frontcourt.

Tyrese Maxey over 29.5 points
Joel Embiid to record a double-double
Jaylen Brown over 28.5 points

On the other side, I am going with Jaylen Brown to score at least 29 points or perhaps go past the 30-point mark here. Brown has been carrying much of the offense for the Celtics even with Jayson Tatum back in the lineup and I expect no less here. Look for Brown to be just as aggressive here in attacking downhill in the hopes of creating easy scoring opportunities and drawing up defensive attention that opens up cleaner looks for both himself and guys like Tatum, Payton Pritchard, and Derrick White.

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It only takes just a couple of minutes to register for an Underdog and unlock its latest promo code BTSLINES for the Celtics-76ers matchup. Below, you can find how you can get started and claim as much as $50 in bonus entries right away.