Left-hander Brian Matusz, recovering from an intercostal strain, was satisfied with his rehabilitation outing for Single-A Frederick on Monday night but said he still had some things to work on.

Facing Potomac, Matusz pitched four innings, allowing one run on two hits and two walks while striking out two.

"I felt good warming up in the bullpen before the game and then when I was on the mound," he said. "It was nice to get four [innings] today; that was big for me. I needed that ? to be able to get up and down and be able to think about things in between innings and kind of just gather myself. I felt like as the innings went on, I was able to relax and not be so mechanical and be a little bit loose."

Matusz said his rhythm was off at times and that his control wasn't as sharp as he would like.