Skaggs threw 15-to-20 pitches at less than max effort under the watchful eyes of pitching coach Charles Nagy.
"It's nice you get to work with the big league pitching coach one-on-one," Skaggs said. "It's a good experience and it's going to help me going into Spring Training to hopefully make the team."
Skaggs will be among those involved in what figures to be a spirited battle for rotation spots next spring.
"He got a good taste of it when he was up here," D-backs manager Kirk Gibson said. "He's going to benefit from having been up here. We didn't want to overdo it. He's going to have to work hard, though, in the offseason, he's going to have to work hard in the spring and prove that he's ready again."
After compiling a 5.83 ERA in six big league starts, Skaggs is plenty motivated to do just that.
"Trust me, when you see me in Spring Training, it's going to be a whole different person," Skaggs said. "You'll see. It'll be fun to watch."