"He's made a couple of little tweaks in his mechanics that helps him load a little bit more, hide the ball a little bit more. Nothing major, just very subtle tweaks. He's just comfortable, I think," Royals manager Ned Yost said.
After Tuesday night's 5-0 win over the Athletics, Guthrie noted that Kansas City was one team that he viewed as a good fit for him -- an interesting comment with him heading into free-agent status.
"Just a team that is young, hits the ball very well in a pitchers' park. A lot of times you see teams that have pitchers' parks and they don't score a bunch of runs. You might have a 3.00 ERA, but at the same time your team is scoring one or two runs," Guthrie said.
"This is a team that can score runs in a nice, big ballpark. They've got good outfielders that can go track it down, and I give up some fly balls, so I thought it was a good fit that way. We'll see -- it's a long ways away and a lot of things can happen in a short amount of time. As you can see, in six days I've had a couple of nice starts and we can talk that way, but I'll focus on being prepared for the next few starts I have before the season is over and see where we go."