"It was quick. That's what I wanted. Get there, throw a lot of strikes and get quick outs," said Walker, who threw 20 additional pitches in the bullpen after he left the game.
Lopez made his second Cactus League start for the White Sox, his first since allowing five runs and four hits in 1 1/3 innings on Feb. 28 against the Reds. He was one of three players acquired from the Nationals in the trade for Adam Eaton on Dec. 7.
"I felt good. I improved, pitched a lot better than the last time," said Lopez, who threw three innings, allowing a run on three hits with three strikeouts, two of which came against D-backs slugger Paul Goldschmidt.