"He looked great," D-backs manager Chip Hale said after the 10-0 victory. "Webster sort of showed us the reason why we coveted him so much in the trade. Great stuff, his mound presence improved and just overall looked great. He let the ball go, and he has really good natural sink and he got a lot of ground balls."
Webster also impressed at the plate as he drove home three runs with a seventh-inning double.
The D-backs eliminated Andrew Chafin and Vidal Nuno as starting-pitcher candidates -- both are now competing for bullpen slots -- two days ago, and the team will need to whittle down the nine candidates left for three spots soon.
Webster figures to still be in the conversation when his next outing rolls around.
"He's in the mix," Hale said. "As soon as you think a guy eliminates himself, he pitches his way back into the mix. It's interesting."
Steve Gilbert is a reporter for MLB.com. Read his blog, Inside the D-backs, and follow him on Twitter @SteveGilbertMLB. This story was not subject to the approval of Major League Baseball or its clubs.