What happened: The latest shot followed a two-homer, three-RBI performance in a 9-5 win four days earlier. Koss also scored twice in that victory.
Why it matters: The burst gives his late-season line a jolt after he entered September with a .498 OPS through 47 games. Continued extra-base production would add another dimension to his infield value.
By the numbers: Koss went 6-for-19 (.316) with four RBI, eight runs and one walk over a five-game stretch to open September.
What to watch: Watch whether the extra-base production persists as September advances.