The National League leader in wins from a year ago yielded two runs on three hits with two walks in four innings in a 7-3 win against the Nationals on Sunday.
In his first outing this spring, Wainwright allowed four runs on five hits with two walks in two innings.
"It was pretty windy. Several times I got blown during my delivery," Wainwright said. "The first game was real frustrating for me, and the second game was better. So, I just will continue to go out there and try to get better and better each time."
Winds averaged 17 mph, with gusts up to 25 mph at Space Coast Stadium on Sunday.
"I was using different aiming points with my fastball at certain times," Wainwright said. "But we're going to have conditions like that sometimes during the season that you have to pitch through, too, so you just got to get outs with whatever conditions you've got".
Wainwright sat down the side in order in the first inning, but allowed two walks, while striking out two in the second.
In the third, Wainwright allowed a leadoff single to Alberto Gonzalez, a one-out, run-scoring triple to Adam Kennedy and an RBI single by Ryan Zimmerman before retiring the side.
Wainwright recovered in the fourth, sitting down the side in order. He threw 36 of 54 pitches for strikes in the no-decision.
"I thought he was pretty good, real good," manager Tony La Russa said. "He got better every time he went out there, so I thought he was very impressive.
"With the wind blowing out to left, it takes special concentration. It really could have been a high-scoring game. I think the pitchers did very well."
Tim Walters is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.