St. Louis Cardinals vs Washington Nationals Prediction and Picks, September 18, 2026

The Washington Nationals have been struggling to score, coming in at nearly two runs behind per game lately. However, they've been hitting well against left-handed pitchers, showing they can put runs on the board. On the flip side, the St. Louis Cardinals have averaged about 0.4 runs behind in their recent games, but they also have a solid approach against lefties. With both teams facing off at Busch Stadium, I think we could see more than 8.5 total runs. The Nationals have a good chance to score against the Cardinals' starter, and the combined expected total is just a bit higher than that. The biggest risk is that both teams are close in their recent form, making it a tough matchup.

St. Louis Cardinals vs Washington Nationals: St. Louis Cardinals +1.5 Spread (-196)

The St. Louis Cardinals need to keep the game close and ideally win by at least two runs tonight against the Washington Nationals. St. Louis has won five of their last ten games, and they've been pretty good against left-handed pitchers this season. They have hit well, matching the league average against lefties. On the other hand, Washington has struggled lately, winning only three of their last ten games and scoring 1.7 runs fewer than expected per game in recent outings. The Nationals have a slightly better hitting performance against lefties, but the Cardinals have the home field advantage at Busch Stadium. The most concrete risk here is that the teams are closer than the records suggest, so it's not a guaranteed win for St. Louis.

That is our read — no bet on this board is a sure thing. Prices can move before you get on, so check the board at your bookmaker. Bet what you can afford to lose. If betting stops being fun, take a break.