Adams, who is recovering from right shoulder surgery, struck out two in one scoreless inning. He threw 12 pitches (11 strikes). Pettibone, who is recovering from inflammation in his right shoulder, walked two and struck out one in three scoreless innings. He threw 40 pitches (22 strikes).
Both hope to be game-ready by the middle of next month.
"I'm still looking at April 14-15 as my return date," Adams said. "If anything pops up before then, we'll address it. But right now, I'm not going to try to set my timetable any earlier."
Todd Zolecki is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.