He's looked capable of regaining that status, but with the San Diego Padres .
Kennedy goes for another strong outing Tuesday night when he faces the Diamondbacks for the first time since they dealt him to the Padres.
Kennedy (5-9, 4.88 ERA) went 21-4 with a career-low 2.88 ERA in 2011, tying for the NL lead in wins while helping Arizona to a division title and its most recent playoff appearance.
The right-hander failed to remain that effective for the Diamondbacks, going 18-20 with a 4.47 ERA over the next season and a half before being sent to San Diego prior to the non-waiver trade deadline July 31.
Kennedy is 2-1 with a 3.20 ERA in four games with the Padres (59-72), turning in his best performance Wednesday to beat Pittsburgh. He tossed seven shutout innings while striking out eight in a 2-1 win.
"We're seeing the pitcher we thought we'd get," manager Bud Black told the team's official website.
Now, Kennedy will take the mound at Chase Field for the first time as a visitor.
"It's going to be emotional for him," Black said. "It's a different feel. I've been there. I think that it's a unique feeling."
Black's club has been struggling offensively, scoring 18 runs over the past seven games while hitting .143 with runners in scoring position. The Padres fell 6-1 on Monday in the opener of this three-game series as they mustered five hits - all singles, and one came from starting pitcher Tyson Ross .
Will Venable had two of those hits. The veteran outfielder is among the NL's top hitters this month with a .374 average in 22 games, getting at least one hit in 21 of them.
He's 9 for 25 (.360) in 13 season meetings with Arizona (67-63).
The Diamondbacks have won seven of nine at home, including four in a row. They haven't had a longer winning streak in Arizona since an eight-game run July 6-24, 2012.
Paul Goldschmidt , who has a career-high 31 homers, is hitting .349 with 10 RBIs in the last 10 games after connecting for a two-run triple Monday. He's the first Diamondbacks player to amass 103 RBIs since Luis Gonzalez had 104 in 2003.
Martin Prado is looking to continue his own impressive production, hitting .365 with 27 RBIs in his last 23 games. He's driven in eight runs over the past three contests, including three in the series opener.
"I'm taking advantage of the situation," Prado said. "I had a difficult course over the first few months and it's good to get going this way."
Trevor Cahill was scheduled to get the ball Tuesday, but he tossed the final four innings of Saturday's 12-7 win in 18 at Philadelphia.
The Diamondbacks are now expected to send David Holmberg to the mound for his major league debut in a spot start.
The 22-year-old left-hander is considered one of the team's top pitching prospects. He's 5-7 with a 2.66 ERA in 25 starts for Double-A Mobile this year, including a 1.59 ERA over his last six.
|San Diego Padres|
|July 31, 2013||Carlos Quentin||15-Day DL||Right knee strain|
|July 23, 2013||Carlos Quentin||Day-to-Day||Sore right wrist|
|July 20, 2013||Jason Marquis||60-Day DL||Strained right elbow|
|July 12, 2013||Kyle Blanks||15-Day DL||Left Achilles tendinitis|
|July 07, 2013||Yasmani Grandal||60-Day DL||Right knee sprain|
|June 22, 2013||Clayton Richard||60-Day DL||Left shoulder surgery - out for season|
|August 24, 2013||J.J. Putz||15-Day DL||Dislocated right pinky finger|
|August 12, 2013||Cody Ross||15-Day DL||Dislocated right hip|
|August 11, 2013||Cody Ross||Day-to-Day||Dislocated right hip|
|August 10, 2013||Eric Chavez||15-Day DL||Hip and knee injuries|
|August 10, 2013||Eric Chavez||15-Day DL||Hip and knee injuries|
|July 29, 2013||Miguel Montero||15-Day DL||Lower back strain|
PHOENIX (AP) -- Aaron Hill had no interest in talking about himself after he delivered the latest dramatic win for the Arizona Diamondbacks .
He chose instead to focus on the resiliency of his team that shook off a couple of late lost leads and ended up on top.
Hill lined a game-winning single in the bottom of the 10th inning to score Adam Eaton and give the Diamondbacks a 10-9 victory over the San Diego Padres on Tuesday night.
"A win is a win, and this was a total team effort," Hill said. "We keep battling back, and this is fun. It's great to see this team rewarded for good things."
Martin Prado 's two run double in the eighth snapped a 7-7 tie, but the Padres tied it again against closer Brad Ziegler .
Prado sent the game to extra innings when he backhanded a liner by Jedd Gyorko down the third base line with the bases loaded in the ninth.
"In that situation, you have to guard the line," Prado said. "You have to be careful and make sure you're in a position to make a play."
Prado, who reached base four times with a single, double and two walks, has hit in 13 of his last 14 games with 21 RBIs. He has a career-high 71 RBIs this season.
Gerardo Parra had a career-high five RBIs for Arizona, and Heath Bell (5-2) pitched a perfect 10th inning for the win.
Eaton opened the 10th with a single to center, and Paul Goldschmidt singled to left. With Hill at-bat and runners on second and third, the Padres employed a five-man infield.
Hill lined a shot against Dale Thayer (2-4) over the head of left fielder Yonder Alonzo for his eighth career game-ending hit.
The Diamondbacks played their 20th extra-inning game this season, second only to the 21 they had in 1999. Arizona is 15-5 in this season's long contests.
San Diego dropped to 7-6 in extra innings.
"No doubt, this was a game which had direction," Padres manager Bud Black said. "This one was hard to describe. The game is played by human beings and you never know how the game will play out. This game was a testament to that."
The Diamondbacks entered the eighth with a three run lead and were up by two runs in the ninth, but couldn't hold on.
Arizona trailed 3-0 in the first inning, but Parra tied it in the second with a three run homer. He drove in two more with a bases loaded single in the fifth when the Diamondbacks grabbed a 6-3 lead.
Both hits came against Padres' starter Ian Kennedy , who made his first start against his former team. Kennedy lasted only 4 1-3 innings, allowing six runs, six hits and a season-high five walks. He also hit a batter.
It was the most runs given up by Kennedy since yielding 10 on June 6 against St. Louis while pitching for Arizona.
Diamondbacks starter David Holmberg also struggled in his major league debut. The first five hitters reached base and three scored.
Kennedy needed only 11 pitchers to get through the first.
The usually reliable Diamondbacks bullpen couldn't hold leads in the eighth or ninth. Will Harris and Brad Ziegler were both charged with blown saves.
NOTES: Padres 3B Chase Headley left the game in the fifth inning with back stiffness. . With Arizona, Kennedy wore number 31, but he had to switch to No. 22 because the Padres retired 31 for Dave Winfield . ... Arizona infielder Willie Bloomquist was named to the Arizona State University Sports Hall of Fame. ... Diamondbacks prospect Chris Owings was named Pacific Coast League rookie of the year. ... Since Aug. 1, Padres leadoff hitters are batting .411, tops in the majors.