It is definitely a balk. In fact, I've seen this as a tactic from youth travel teams in SoCal here trying to draw a balk this way by calling super late timeouts with a runner on 3rd. Seen it work a few times.
The Mariners are so bad defensively. Unbelievable. It could literally cost them the last two games against the Astros.
Ok. Just woke up. Zero runs against a mediocre starter? Sounds like par for the course. Judging by low K total, like McCullers battled through? If so, good for him given previous years’ road woes.
He’s been an adventure defensively against us… and a low 500s OPS across ~250 PAs is spectacularly poor.