Josh Collmenter started in place of Skaggs on Tuesday against the Giants.
After three strong starts to begin his Major League career late last month, Skaggs' last three have resulted in a 10.50 ERA, and some have raised concerns about his velocity being in the upper 80s toward the end of his last start as opposed to the low 90s he hit earlier in the game.
"Just the way he was trending," D-backs manager Kirk Gibson said in explaining the decision. "He feels fine, but his velocity was way down in his last game. The conversation started with the risk versus the reward and we just felt like we didn't have anything to gain by continuing to have him do that."
For Gibson and general manager Kevin Towers, the decision involved more than just a drop in velocity.
"You're throwing 87, 88 your last time out and you started out at 94 this year," Gibson said. "That in itself isn't that concerning, but when you don't have the ability to throw the ball where you want to, you don't have your fastball command, I think now you're setting him up for a lot of failure. Little concerned about putting him out there in that situation."
All parties involved say that Skaggs is not experiencing any discomfort so they are not concerned about injury.
While Skaggs will not start, he will continue to work on his conditioning and could throw some flat-ground bullpen sessions and could even throw off a mound to work on some mechanical issues.
The only way he will see game action, Gibson said, is if the D-backs find themselves in an emergency situation in an extra-inning game.