They were either trying to save Williams' arm (he came in on the first 3rd down), or they were under the impression that Spector....adds something. What, I'm not sure. He's playing his worst ball imo.
Eh. As someone said above, Stroud made a really nice 3rd down throw that his TE should have caught. After that drop, it was done.
I don't like his on field body language at ALL, but I'm not going to sweat him for his reaction to the dell injury.