Eh. I'm not as worried about Arrieta holding up as I was even a month ago considering how well he's been pitching and his velocity has increased from last season and even as this season has progressed. However, Arrieta, too, is about 60 innings over his career high and dealt with a shoulder injury just last season. He's in amazing shape, but that doesn't always prevent arm injuries. It's not as bad as how Prior was used, and I didn't even have much of a problem with the decision tonight, but I can certainly understand those who do.