"It felt good; I was happy with the inning," Santos said. "I was throwing strikes for the most part. The ball was coming out great. I felt fine, just building on another good day."
Until Saturday, Santos had not thrown in a Grapefruit League game since March 3 against the Phillies. He experienced some discomfort in his right triceps muscle later that night and was eventually shut down for almost a week.
Santos prepared for his outing against the Orioles by pitching in one Minor League game earlier this week, and he is now expected to resume a full schedule of work.
The California native is set to pitch again Tuesday in relief of Mark Buehrle. Santos would also like to throw on back-to-back days and pitch two innings in an outing before heading north for the start of the regular season.
"There's nothing right now that I'm worried about or thinking it might come back," Santos said of his injury. "I should be ready to go again on Tuesday."
Gregor Chisholm is a reporter for MLB.com. Read his blog, North of the Border, and follow him on Twitter @gregorMLB. This story was not subject to the approval of Major League Baseball or its clubs.