"He threw all his pitches. He had a heavy sink. We'll see how he comes out of this, and go from there, see if he can pitch back-to-back days."
Burnett's first season with the Angels in 2013 was limited to 13 appearances covering 9 2/3 innings with a 0.93 ERA.
"He hasn't pitched for a year, so he needs to go have a Spring Training," Butcher said, "but if he keeps progressing like this, it won't be long before he's facing some hitters."
Meanwhile, right-hander Dane De La Rosa (forearm) pitched a Minor League inning in Arizona.
"He felt good, he looked good," manager Mike Scioscia said. "It's an important first step. We'll see how he responds."
Earl Bloom is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.