Couple of things.
Some of the reasons Price's ERA is high is because of his LOB% and BABIP. They are way ridiculous, 54% & 373....but... His K/9 is still great; 11. So, on the bright side you could expect a regress here.
On the other hand his HR/FB is 11.8%. Just like I said in Porcello's case, If he doesn't improve this, his ERA will stay high regardless his K/9.
Unlikely Porcello, the good news is that Price's career HR/FB% is average, while Porcello's isn't -- it is 12%. Price is around 9% after 8Y. Said that, Is his HR/FB% high due to the diminish of his velocity? or is it due to his command? or both? Anyways he has to settle down his HR/FB%, soon... tonight.