The Cubs and the Marlins both didn't like the medicals on the Miami trade, so the Cubs do look at these things. Matt Trueblood wrote an article explaining how the velocity drop had a mechanical and a pitch shape change to go with it as well as using the fastball differently. That suggests intention. One thing I mentioned a few times; he raised his arm slot and raising an arm slot brings more load into the shoulder area. Mike Soroka has shoulder discomfort.
We can believe a few things here. It's possible that the Cubs, the day before the trade deadline, basically ignored all of the velocity drop, didn't perform a decent physical and bought a pitcher who was clearly hurt. I'll be honest with you and say that I don't buy that. He may have gambled a little on the medicals, but I think with as much time as he had left on Thursday, feel like he probably felt good enough with everything.
I know that the velo drop seems like it has to be tied to this, but I'm not as sure as others. Jed didn't just ignore it. I think it's very, very, very likely that if you and I can pull this up on a Savant page, Jed probably can too.
We'll see what comes of this. We may never know exactly what happened and when. But Hoyer isn't so incompetent to have entirely ignored this.