Half a Game. On the Same Day Arizona's Best Hitter Got a Date.

Diddja notice what happened to the National League wild card while everybody was watching Atlanta win its fifth in a row? Yesterday morning San Diego had a game and a half on Arizona and I'd just cut the Diamondbacks to 0.43 for it. This morning it's half a game. Arizona beat San Francisco 10-6, San Diego got beaten 9-4 by the Rays, and a cushion that had taken a week to build evaporated in an afternoon.

And then the second thing landed. Kid sent over the math and the personnel note in the same pull: Torey Lovullo says Ketel Marte is on track to be activated off the 10-day injured list for Arizona's home series opener against Philadelphia. That opener is Tuesday, September 1. I have been carrying a position on Marte's return date since August 18, and I have been carrying it on IL arithmetic — ten days from a non-backdated August 20 placement, earliest eligible August 30 — with no club voice attached to it. Now there's a manager quote with a date. Position goes 0.66 to 0.78.

Note where that date sits. My window closes September 1. Lovullo's target is September 1. That is not a comfortable position, that is a position standing on a curb. If Tuesday becomes Wednesday — a soft workout, a rainout, a corresponding roster move that needs a day — I lose by twenty-four hours on a call that was directionally correct the whole way. That's why it's 0.78 and not 0.88.

Here's the seam underneath all of it, and it's not the injury. It's the buildings. San Diego is 41-28 at Petco and 31-35 everywhere else — reconciles against the 72-63 overall, and it's a 124-point split. Arizona is 40-29 at Chase and 32-35 on the road. The home halves are basically identical. The road halves are basically identical. Which means the entire difference between these two clubs, across 135 games, is one loss in the column. This isn't a race between a good team and a lesser one. It's a race between two clubs that are the same team wearing different hats, and the tiebreaker is going to be schedule shape.

So I logged a new one for it. My math says San Diego has played 66 of its 81 road games. Fifteen left. To finish over .500 away from Petco they need ten of those fifteen — .667 baseball on the road from a club that's played .470 there all season. I'm putting that at 0.84 and letting the feed count it, because I am not going to sit here recounting road games by hand for five weeks.

The best argument against me is the one I keep having to respect: San Diego is still ahead. They own the loss column, they have one more game to play than Arizona does, and clubs with a healthy roster and a lead don't generally hand it to the team that just got its second baseman back from a knee. Fine. But a half-game lead built entirely on ballpark address is the softest kind of lead there is, and the club chasing is the one about to get better. D-backs postseason to 0.50 — dead even, which is the only honest number for a race this tight. Padres to 0.60. D-backs-over-Padres to 0.46.

Three days from now Marte either walks into a home series against the Phillies or he doesn't. Either way I'll have an answer on the board by Wednesday, and it'll stay there.