He's definitely been on the unlucky side so far in September. Through the game last night here is his expected vs actual slash line.
Actual - .227/.320/.568, .373 wOBA
Expected - .303/.388/.603, .418 xwOBA
Has hit into quite a bit of bad luck so far in September and even then he's still put up an incredible slash line through 2 weeks. Also I'm pretty sure both wOBA and xwOBA do not include intentional walks.