Something I've noticed about betting odds this season is Mariners have mostly been solid favorites, like +200, whenever Castillo is starting. I'm pretty sure if I had bet against the Mariners for every Castillo start, I'd be doing pretty well. Not that the Mariners lose so much when he's pitching, but when they do it's a pretty good payout.
They were +200 a couple days ago, but the line has moved to +180, which probably means others have caught onto my last paragraph.

7:10 start (local)