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The 15th and final game of Sunday's packed MLB schedule is a huge National League East matchup between the New York Mets and Philadelphia Phillies. The two division rivals face off on ESPN's Sunday Night Baseball, and the winner of this game will not only win the series but take over first place in the NL East. If you're interested in betting on Sunday Night Baseball but need to know where to bet and how to bet on Mets vs. Phillies, we've got all the information you need about the top available betting apps and sportsbook promos. 

Best MLB betting apps and sportsbook offers

Top sportsbooks are offering promotions for new users who sign up, which we've broken down here. 

Brand

Promo

CBS promo code

FanDuel

Bet $5, get $200 in bonus bets if your bet wins

None required

DraftKings

Bet $5, get $300 in bonus if your bet wins

None required

Fanatics

Bet and get up to $1,000 in No Sweat Bets

None required

BetMGM

Up to $1,500 in bonus bets if your first bet loses

CBSSPORTS

Caesars

Bet $1, double your winnings your next 10 bets

CBSDYW

bet365

Bet $5, get $150 in bonus bets win or lose

CBSBET365

Three of the top sportsbooks are running "bet and get" promotions where new users can earn bonus bets after placing a first bet of at least $5. With the DraftKings promo code, new users receive $300 in bonus bets in the form of 12 $25 bonus bet slips if they win their first bet of at least $5 at -500 odds or longer. The FanDuel promo code is similar, as it is for $200 in bonus bets if a user wins their first bet. There's no minimum odds requirement for that qualifying wager. The bet365 bonus code offers the lowest total bonus bets at $150, but you don't need to win your first bet of at least $5 like at DraftKings or FanDuel.

The BetMGM promo code and Fanatics Sportsbook promo code also offer bonus bets, but only if your bets lose. BetMGM matches your first bet up to $1,500 if it loses, returning your stake in bonus bets. Fanatics' offer is similar, but it covers your first bet of the day for each of your first 10 days with the sportsbook. Each of those bets is covered up to $100, meaning if you placed a first bet of the day at $100 across all 10 of your first days with Fanatics and all those bets lost, you'd get $1,000 in bonus bets back.

The Caesars Sportsbook promo code gives users profit boost tokens rather than bonus bets. After placing a first wager of at least $1, regardless of whether that bet wins or loses, you receive 10 100% profit boost tokens, each worth a maximum stake of $25. 

Betting on Mets vs. Phillies

Each team has won a game this series, with the Phillies taking Friday's contest 10-2 and the Mets rebounding with an 11-4 win on Saturday. In the first game, Nick Castellanos and Bryson Stott each had three RBIs and ace Zack Wheeler, who started his MLB career with the Mets, struck out eight while not allowing a run over five innings of work. Pete Alonso and Jeff McNeil both hit home runs for the Mets against Philly's bullpen, but it wasn't enough as New York's relievers allowed eight total runs between the seventh and eighth innings. In the Mets' win on Saturday, Francisco Lindor, Brandon Nimmo and Juan Soto all had monster games, combining for eight hits, five home runs, six extra-base hits and nine RBIs in New York's blowout victory, which snapped a seven-game losing streak.

Sunday's series finale features an intriguing starting pitching matchup as two lefties will toe the rubber. David Peterson (5-2, 2.60 ERA) gets the ball for New York while Philadelphia will counter with Jesus Luzardo (6-3, 4.41 ERA). Peterson has been New York's top starter this year, following up on a very good 2024 campaign. He allowed two runs to Philadelphia when he faced the Phillies in April, and he has four quality starts over his last five starts, including a complete game shutout of the Nationals last week. Luzardo's had a better 2025 season than his numbers would indicate. He had a horrific two-start stretch last month where he allowed 20 earned runs, but he's largely been very good besides that stretch. Luzardo allowed four runs in five innings in his last start against the Marlins. The SportsLine Projection Model has issued a 4.5-star recommendation for Peterson's strikeout prop total of 4.5, taking the Over with a projection of 5.4. As for Luzardo, his total is 5.5, and the model leans Over with a projection of 5.6. That prop is rated at 3 stars. 

If you're looking at MLB player props for Sunday Night Baseball between the Mets and Phillies, Alonso is the favorite to homer at +270. Kyle Schwarber has the second-shortest odds at +300, and he's followed by Lindor (+320), Soto (+350), Castellanos (+475) and Nimmo (+500). 

The Phillies are -124 favorites on the money line, per SportsLine consensus odds, while the Mets are +104. The total is 9 runs, with the Over favored at -112 and the Under at -108. 

Responsible gaming

It's paramount for bettors of all experience levels to practice responsible gaming, which includes not chasing losses. Sportsbooks offer tools and resources like wager limits, timeouts and self-exclusion to assist users with responsible gaming. Some national resources available are The National Council on Problem Gaming, Gamblers Anonymous and 1-800-GAMBLER.