With a good chunk of games going this afternoon (including the one at Coors), we drop down to seven games for the main slate, though it isn't lacking in stacking potential with beatable arms like Jason Vargas, Kohl Stewart, Tyson Ross, and Ervin Santana taking the mound tonight.

Each day here on numberFire, we'll go through four offenses ripe for the stacking. They could have a great matchup, be in a great park, or just have a lot of quality sticks in the lineup, but these are the offenses primed for big days that you may want a piece of.

Premium members can use our stacking feature to customize their stacks within their optimal lineups for the day, choosing the team you want to stack and how many players you want to include. You can also check out our hitting heat map, which provides an illustration of which offenses have the best combination of matchup and potency.

Now, let's get to the stacks.

Philadelphia Phillies

The Philadelphia Phillies are scuffling in this Mets series, and Citi Field isn't an ideal venue for stacking, but Jason Vargas is a guy we want to stack against while we still can.

The veteran lefty may not be long for this rotation, getting lit up for 11 runs over 10 1/3 innings with a truly abysmal 6.65 SIERA, 10.9% strikeout rate, and 12.7% walk rate. He wasn't all that great in either of the prior two seasons, posting SIERA marks of 4.32 and 4.86, but with his velocity quickly evaporating, the tank may be just about empty.

The Phillies can deploy a lineup practically entirely of right-handed bats, and the one projected lefty, Bryce Harper ($4,700), should be able to get in on the fun, too, after producing a .397 xwOBA in lefty-lefty matchups last year. Rhys Hoskins ($4,300) is always a threat to go deep, owning a 42.1% hard-hit rate and 47.4% fly-ball rate this season, and Andrew McCutchen ($4,400) has always performed well with the platoon advantage.

On the value end, Aaron Altherr ($2,000) has done basically nothing in limited opportunities this season, but he costs the minimum and could draw a start against the southpaw. He's better than he's shown, posting a respectable .356 xwOBA against lefties over the past two seasons.