FanDuel Best MLB DFS Picks: Marlins vs. Phillies 9/23/25

Major League Baseball presents FanDuel baseball fans with a National League matchup featuring the Miami Marlins and the Philadelphia Phillies. Let’s take a look at this MLB game from a DFS perspective.

Before we dive into the Miami Marlins vs. Philadelphia Phillies game let’s review the rules for the FanDuel single game showdown contest.

FanDuel Single Game Contest Rules

Here are the FanDuel single game contest rules. You have $60,000 to utilize on five players from either team. However, one of those players will be designated as your team MVP. The MVP accumulates 1.5x times the standard FanDuel fantasy points value. Additionally, the MVP is 1.5 times the standard cost of the flex position.

The remaining five players in your lineup will be flex plays. The five flex positions will receive the standard FanDuel points value. Having stated that, it is highly important for you to identify the correct player for your MVP position if you hope to win a large field GPP (guaranteed prize pool) FanDuel single game contest.

If you have additional questions regarding the rules for the single game contest, I highly recommend that you check out the FanDuel website for more details.

*It should be noted that FanDuel does not utilize the pitcher position in single game MLB contests. Having stated that, only batters are available for single game MLB lineups on the FanDuel platform.

Here are my FanDuel picks for tonight’s Miami Marlins vs. Philadelphia Phillies matchup.

FanDuel MLB DFS Picks

MVP-Bryce Harper, First Baseman, Philadelphia Phillies $12,800

On Tuesday night, Major League Baseball presents the opening game of a three-game National League series featuring the Miami Marlins and the Philadelphia Phillies.

How are these two teams playing entering tonight’s MLB game? The Philadelphia Phillies arrive at the first game of this three-game series with the Miami Marlins playing below average baseball. The Phillies have lost three of the team’s last four games played in the 2025 MLB regular season, including a 5-0 shutout loss to the Los Angeles Dodgers last week.

In direct contrast to the Philadelphia Phillies, the Miami Marlins are playing good baseball entering the opening game of this National League series. More specifically, the Marlins have won six of the team’s last seven games played in the 2025 MLB regular season, including a 4-2 win over the Texas Rangers two days ago.

Now that we have identified how both of these teams are currently playing let’s turn our attention to tonight’s contest. First Baseman Bryce Harper has certainly been a standout performer for the Philadelphia Phillies this season. With that said, how has the veteran first baseman performed from a statistical standpoint in 2025? Let’s review’s Harper’s relevant game data from the 2025 MLB regular season to answer that question.

In the 128 games that first baseman Bryce Harper has played for the Philadelphia Phillies in the 2025 MLB regular season, Harper has compiled a robust .263 batting average, 27 home runs, 68 walks (25th in MLB), 75 RBIs (runs batted in), 72 runs scored, a .358 OBP (On-Base Percentage) and an .853 OPS (On-Base Plus Slugging) which ranks 15th in MLB.

In my opinion, Bryce Harper is the most likely player to accumulate the most FanDuel points in this MLB game. Having stated that, I am backing Philadelphia Phillies first baseman Bryce Harper at the MVP position for this one game MLB DFS slate.

Flex plays I like to play well in this MLB regular season game (FanDuel price noted): Kyle Schwarber, Outfielder (Philadelphia Phillies) $14,800: Harrison Bader, Outfielder (Philadelphia Phillies) $8,000: Dane Myers, Outfielder (Miami Marlins) $3,800.