"His live BP was pretty impressive the time I was over there," said Cubs manager Rick Renteria, who watched a little of Hammel's workout. "He was obviously hitting the mitt and his command of the zone was down. He was very composed on the hill. He's been around a while. He's looking pretty good."
Hammel, who was the Orioles' Opening Day starter last season, said he was able to throw all of his pitches. Pitching coach Chris Bosio helped, too.
"[Bosio] gave me great tips today, giving me some things to work on," Hammel said. "George Kottaras was my catcher today, and we were right on the same page. Overall, the first few days, the week, it's been great and good so far."
Carrie Muskat is a reporter for MLB.com. She writes a blog, Muskat Ramblings, and you can follow her on Twitter @CarrieMuskat. This story was not subject to the approval of Major League Baseball or its clubs.