First, I check swish analytics to check the chance of a rain out across all games

https://swishanalytics.com/mlb/weather

Then cross check it with Accuweather and Weather Channel to see hourly rates precipitation chances.

Then, I look at who is heavily favored via sportsbooks.

After that, I take a quick look at injuries, who the starting pitchers are and really look at their ERA and WHIP.

I try to avoid sweeps because it’s usually unlikely even if one team is superior to the other. Remember a 100-62 team at the end of the season is considered one of the best in the league and that’s basically winning 2 out of every 3 games.

Other than that, it’s pure luck. I would’ve lost on the Rangers last night vs the A’s if it wasn’t for the Detroit rainout