The 2019 World Series comes down to a decisive Game 7 after the Nationals took Game 6 by a final score of 7-2 on Tuesday. For MLB DFS players, that means one last night to enter tournaments, cash games, and 50-50s on sites like DraftKings and FanDuel. Nationals pitcher Max Scherzer warmed up in the bullpen but wasn't needed in the win, so he'll be on the mound on Wednesday. Meanwhile, the Astros will be sending six-time All-Star Zack Greinke to the bump. With plenty at stake in MLB DFS tournaments, submitting the optimal lineup means targeting the right individual matchups in World Series Game 7. Greinke has a 5.30 ERA this postseason, while Scherzer has a 2.16 ERA in the 2019 MLB Playoffs, but if Scherzer's pitches are impacted at all by recurring muscle spasms, it could be a game-changer. So before you make your World Series DFS picks, see the optimal MLB DFS strategy from SportsLine's Mike McClure. He's won almost $2 million in his daily Fantasy sports career and can help you find the top Astros vs. Nationals DFS picks.

When it comes to MLB, McClure is at his best. Recognized in the book "Fantasy Football (and Baseball) for Smart People: How to Turn Your Hobby into a Fortune" as a top MLB DFS player, McClure's proprietary projection model simulates each game 10,000 times, taking factors such as matchups and recent results into account. This allows him to find the best values on every site.

He's crushed his MLB DFS picks in 2019, producing lineups on SportsLine that have returned as much as 30x. He also finished in the top 1 percent of tournaments four times and the top 0.1 percent of tournaments twice in the first half of the season. He cashed huge in three consecutive tournaments in mid-June, which included a top 2 percent finish when his DraftKings lineup generated a whopping 185.9 points. He also had an optimal lineup on FanDuel that cashed 8x for followers the Friday before the All-Star break. Since then, he's had multiple lineups cash between 5x and 10x.

And for Tuesday's World Series Game 6, he was all over Houston Astros center fielder George Springer. The result: Springer doubled twice and scored a run. And on Friday, McClure's optimal FanDuel lineup cashed for almost 20x. Anyone who has followed him has seen huge returns. Now, McClure has set his sights on Wednesday's World Series 2019 Game 7.

One of McClure's top MLB DFS picks for Wednesday is Astros first baseman Yuli Gurriel. The contact specialist showed improved power during the regular season, slugging 31 home runs despite a previous career-high of just 18. Gurriel slashed .298/.343/.541 on the season and was particularly effective against right-handed pitching. 

Gurriel hit 24 of his 31 home runs against righties and posted a .916 OPS against them. In Scherzer's first start in Game 1, Gurriel went 2-for-5 with a double and two RBIs and was 2-for-3 off Scherzer. That should give him plenty of confidence against the Nationals' ace at home on Wednesday night.

McClure's optimal MLB DFS strategy Wednesday also involves rostering Nationals shortstop Trea Turner. The five-year veteran has helped the Nationals to within one victory of their first world championship with consistent offense ever since he returned from a broken finger in May. Turner has four doubles and 10 runs scored in the Nationals' postseason march, and went 2-for-5 with a double and two runs scored in Game 6.

McClure is also targeting a player who is undervalued in MLB DFS and set to explode for huge numbers on Wednesday. The stars are aligning for him to return tournament-winning value and he comes at a price that won't break the bank. This pick could be the difference between cashing in big or going home with nothing.

So what are the optimal MLB DFS lineups for Game 7 of the 2019 World Series? Visit SportsLine right now to see DFS millionaire Mike McClure's complete optimal tournament and cash game lineups for FanDuel and DraftKings, and cash in big on MLB DFS.