Winless since Opening Day, Arizona right-hander Ian Kennedy will look to get back on track and deliver a D-backs series win against Edinson Volquez and the Padres on Sunday in San Diego.
Kennedy has just one victory in his first six starts, but he may have come to the right place.
In 11 career starts against San Diego, he is 7-1 with a 2.79 ERA. He's also 3-0 with a 1.13 ERA in four career starts at Petco Park.
Kennedy took the no-decision in his previous outing against the Giants, allowing four runs on seven hits in seven innings.
"I noticed my fastball wasn't as good command-wise, so I knew I had lean more on my offspeed," Kennedy said. "It's awfully tough when your fastball command isn't good, though."
Meanwhile, Volquez will try for his third straight win.
Volquez has already had a season full of highs and lows, beginning the year with three straight losses before finding his form.
On Tuesday against the Cubs, the right-hander surrendered four runs on seven hits in 5 2/3 innings for his second win of the season. It marked his second quality start in his last three outings.
"It all starts with starting pitching," Padres manager Bud Black said. "Quality starts give you a chance to win."
D-backs: Gregorius returns from concussion
Shortstop Didi Gregorius was reinstated from the seven-day concussion disabled list on Saturday.
To make room for Gregorius on the 25-man roster, outfielder Alfredo Marte was optioned to Triple-A Reno.
Gregorius was hit in the head by a Josh Outman fastball on April 26 against the Rockies. He played in extended spring training games on Thursday and Friday at the team's Salt River Fields complex in Scottsdale, Ariz.
Padres: Defense improving this season
The Padres committed 29 errors in the first 30 games last season. This year, the Padres have cut that number by more than half.
They have made 14 miscues in the same span, a vast improvement that has kept the Padres from hurting themselves.
"The focus since the spring has been on playing sound, fundamental baseball," Black said on Saturday. "This year, our defense has improved at all positions. We're doing the routine things right. We're not looking for great plays. We're looking for steadiness. We're looking for outs that should be recorded, and we're getting that."
Black's pregame comments might have jinxed his Padres, because they made two errors out of routine plays in an 8-1 loss. Pitcher Clayton Richard allowed a run to score on an errant throw to first in the second inning, and shortstop Everth Cabrera pulled first baseman Yonder Alonso off the bag with a poor throw in the sixth.
• Padres infielder James Darnell, injured since the spring with an oblique strain, was reinstated from the 15-day disabled list following a rehab assignment. He was immediately optioned to Triple-A Tucson.
• Padres third baseman Chase Headley had a single in the sixth inning of Saturday's loss to Arizona, which extended his hitting streak to nine games. He went 1-for-2 and was hit by a pitch.
Quinn Roberts is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.