Reminder: Always double check the lineup card before rosters lock to make sure that a player you've chosen to roster is playing that day, and check the weather to make sure your players won't get rained out of their game.
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Here are a few pitching options.
The first is Vincent Velasquez ($9,000) vs the Brewers, for a few different reasons. First, the Brewers have the highest K% vs RHP at 27%, and it comes with a bottom third wRC+ of 89 and below average ISO. Secondly, Velasquez has a strong K% of 28.4%, with an above average ERA (3.63) and FIP (3.65). Because of the swing and miss in the Brewers lineup, combined with Velasquez's strikeout ability, a high ceiling for strikeouts is in this matchup. Velasquez has also hit a slump over his last few starts, which usually helps drive ownership rate down. The Phillies offense is bad, so run support is never a given, but Velasquez has a good chance to pitch 6 innings with a strong strikeout total and only a few runs allowed.
The second is Kenta Maeda ($8,600), who is a safer play than Velasquez, although probably has less upside. Maeda faces the rancid Braves who rank last in wRC+ (70) and ISO (.092) vs RHP. They don't strikeout a whole lot vs RHP, so swing and miss upside is somewhat limited, but their ability to score runs is very bad. Maeda has a 3.00 ERA, 3.52 FIP and 22.4% K%. Maeda will be a good bet to prevent runs and get the win.
Another pitching option is Drew Pomeranz ($8,900) vs the Rockies in PetCo. The Rockies have a top 10 highest K% vs LHP at 23.3% and a below average wRC+ of 93. Rockies hitters also tend to struggle more on the road than other teams because of the extreme change in park effects with ball movement.
For hitters, here are a few options I will probably play. Matt Kemp has hit LHP to a 149 wRC+/.347 ISO this year, and has a 135 wRC+/.247 ISO vs LHP dating back to the start of last season. He faces Chris Rusin, a below average lefty, and his price is affordable.
Julio Teheran has improved production vs LHB this year, but he's still allowing a below average .790 OPS with an ugly 6.01 FIP. Leadoff hitter Chase Utley ($3,200) has hit RHP to a 148 wRC+ and .168 ISO this year. Joc Pederson ($2,800) is very affordable and has hit RHP to a 125 wRC+ and .231 ISO. Corey Seager ($3,400) has hit RHP to a 116 wRC+ and .173 ISO.
Doug Fister is a similar concept to Teheran with his production vs LHB. He's allowed a .307/.372/.556 slash to LHB with a 6.09 FIP. Catcher Stephen Vogt ($2,800) is affordable and has hit RHP to a 104 wRC+ and .143 ISO this year, well above average numbers for the catcher position.