"I don't feel it when I'm throwing," Arroyo said. "I still have a big lump and it's really sore to the touch, but it doesn't bother me, throwing-wise. It's still probably going to be sore when I throw in my first outing. It's going to take a while to get the bruising out of there, but I don't feel it at doing anything on the field."
After being struck on his hand by Murphy, Arroyo immediately went for X-rays that came back negative. He was remarkably feeling good the following day.
In five starts this spring, totaling 23 innings, Arroyo posted a 3.13 ERA and gave up 30 hits and three walks with six strikeouts. His first regular season start is expected to be on Thursday vs. the Angels.
"I've had a good spring, for me," Arroyo said. "I had really great command, good movement on a lot of pitches. I was able to work on some stuff. This doesn't guarantee you anything, but this is as comfortable as I've ever felt on a big league field for an extended period of time. You can't really ask for more than that coming out of Spring Training."
Said Reds manager Dusty Baker: "He's thrown the ball well all spring. I've never seen him so sharp this soon."
Mark Sheldon is a reporter for MLB.com. Read his blog, Mark My Word, and follow him on Twitter @m_sheldon. This story was not subject to the approval of Major League Baseball or its clubs.