PHOENIX -- Zac Gallen was able to get two strikes on Giants hitters, but when it came time to put them away, the D-backs right-hander had trouble finishing them off.

Meanwhile, the Giants got a good outing from Kevin Gausman and rode that to a 7-1 win over the D-backs on Wednesday night at Chase Field.

Here are some things to know about the game:

Gallen was having trouble throwing his changeup

The changeup is arguably the most important pitch in Gallen's arsenal because it makes his fastball velocity play up and it's something outside of either velocity or spin that can get hitters to swing and miss.

Against the Giants, Gallen was only able to land three of his 13 changeups for strikes.

"The outings I haven't had it are the ones that aren't as desirable [an outcome]," Gallen said. "It's been a work in progress. Like sometimes I feel pretty good with it. And then sometimes, I'm throwing good ones that are getting takes, or not many balls in play with it. So it's been pretty frustrating, but it's the most feel pitch for me so I've just got to have the right feel for it to be able to locate it and be successful with it."

This was the most pitches Gallen has thrown in a game this year

Gallen has had a pair of injuries this year -- a hairline fracture of his right forearm toward the end of Spring Training and a sprained UCL in his right elbow -- so D-backs manager Torey Lovullo has been careful with his pitch counts.

Wednesday, he took the leash off Gallen and allowed him to throw 109 pitches.

Lovullo sent Gallen out to start the sixth at 87 pitches, and with two outs and runners on second and third, he left him in to face Donovan Solano, who had homered against him earlier to account for the game's only run.

"I brought him back out for that sixth and I just felt like giving him a chance to come back in the dugout with an opportunity to win a baseball game," Lovullo said. "We had targeted Solano as a potential last batter if we got down there and it just didn't work out the way we want it to."

Solano singled to right, scoring a pair of runs, and Gallen left the game trailing 3-0.

Misfortune struck the D-backs in the seventh

The game was still within reach at 3-0 when Jake Faria came on for the seventh. The right-hander retired the first two hitters he faced and then got LaMonte Wade Jr. to strike out.

However, the strike three pitch bounced past catcher Bryan Holaday and Wade was able to reach first to extend the inning. The Giants managed to score four more runs to put the game out of reach.

"The wheels came off a little bit," Lovullo said. "Unfortunately [Holaday] didn't get down and smother that ball and collect the out at first base. And then it's a collective responsibility by the entire team to go out and execute at a high level to pick one another up and get out of that inning and unfortunately couldn't do it."