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.
Zack Greinke ($12,600) vs Philadelphia Phillies
The Phillies have the worst run differential in baseball at -126 and toss RHP David Buchanan; the Dodgers offense has owned RHP all season and Greinke will be a massive favorite to get the important 4 point win. The Phillies as a team don't strike out a whole lot vs RHP, but they have the 2nd worst wRC+ in baseball vs RHP at 84. Greinke will be a great bet to go deep into the game with a decent strikeout total, strong run prevention and the win.
Cardinals LHB vs Michael Lorenzen
Lorenzen has allowed a brutal .323/.436/.597 line against LHB this year with a FIP just under 7. Cardinals LHB get a huge park upgrade in Great American Ballpark and will be in great position to do serious damage against Lorenzen. Matt Carpenter ($3,200) is priced affordably and owns a 143 wRC+/.199 ISO vs RHP this year and has been hitting leadoff, giving him extra chances at PAs. Kolten Wong ($3,000) has hit RHP to a 128 wRC+/.182 ISO this year. A punt play option can be Brandon Moss ($2,200), who has been a huge disappointment since April ended but the opposing pitcher + ballpark effects can significantly increase his chances of doing something productive today.
I mentioned the Dodgers above; they're also a strong play vs RHP David Buchanan in a better hitting environment in Philly. Andre Ethier ($2,700), Yasmani Grandal ($3,400) and Adrian Gonzalez ($3,300) have crushed RHP this year and are all affordable options. Grandal had the day off yesterday, so he'll be in the lineup today.
Pitching is ugly in the late game today, but Chris Heston ($7,900) stands out as the best option to me by the numbers. The Cubs offense is 4th worst in baseball vs RHP with an 88 wRC+ and they have the highest K% vs RHP at 24.4%. Heston doesn't strike out a lot of batters (19%), but the Cubs offense will likely make that K% play up. His strong GB% can also help reduce the chances of the Cubs hitting home runs. On the year, Heston has an above average 3.24 ERA and 3.22 FIP. The Giants offense also has recently overtaken the Dodgers as the #1 offense vs RHP by wRC+, which will be needed against RHP Jason Hammel, who is having a strong season.
Red Sox RHB vs CC Sabathia
CC, one of the greatest starting pitchers of his era, is in the middle of a sad decline. In particular, he cannot get RHB out anymore; he's allowing a .325/.371/.554 slash to righties in 2015 with a 5.63 FIP. 1B Mike Napoli ($2,600) is still hitting LHP well with a 135 wRC+/.280 ISO this year and is priced very affordably. OF Hanley Ramirez ($3,500) hasn't been the same since crashing his shoulder into the Fenway outfield wall earlier in the year, but he's still got good power numbers on the year against LHP with a .232 ISO (his wRC+ is down to only 107, but this may have something to do with a .254 BABIP, 70-80 points lower than it has been in recent years). Xander Bogaerts looks like an appealing option with a 163 wRC+ and .945 OPS vs LHP this year, but it comes with a .459 BABIP and .119 ISO; the production doesn't look sustainable, so be careful there.
Punt play: C- Stephen Vogt ($2,300) vs Scott Feldman
A slump has resulted in a large price drop for Vogt, but he's still hitting RHP to a 135 wRC+/.217 ISO on the year and faces a below average RHP. Vogt can be a good play for a fantasy owner looking for salary relief to spend elsewhere, especially with games being played in Yankee Stadium and the Rogers Centre tonight.
Follow me on Twitter at @TimFinn521, I usually tweet out more good options as lineups are released.