They will try to figure him out when they open a two-game series against the Rockies at Bank One Ballpark.
Jennings held the Diamondbacks to only two hits in 6 2-3 scoreless innings in a 6-2 home win Wednesday.
“Jennings was mighty good,” Diamondbacks manager Bob Brenly said. “There wasn’t much we could do with him.”
Jennings is 5-1 with a 2.76 ERA over his last six starts, but manager Clint Hurdle doesn’t believe his pitcher has recaptured the form that made him the NL rookie of the year in 2002.
Jennings went 16-8 last season with a 4.52 ERA.
“He’s had good numbers, but for me, maybe I’m harder on him than others but I still don’t see the command that we would have thought after last year,” Hurdle said. “But one thing at a time. He’s getting results.”
The Rockies failed to sweep their road series against Milwaukee, losing 3-1 Sunday. However, they have won three of their last four road series despite a 15-29 mark away from Coors Field.
Todd Helton drove in the lone run for Colorado, which has won four of six.
Helton, elected to the All-Star game as a NL starter for the third straight year, is batting .384 (33-for-86) over his last 21 games with three homers, 10 doubles, three triples and 13 RBIs.
The Diamondbacks have won 17 of 21, including Sunday’s 2-1 victory at Los Angeles.
Gonzalez, selected to the All-Star team for the fourth time in five years, was 0-for-2 with two walks. He is batting .354 (17-for-48) over his last 13 games with two homers, five doubles and 11 RBIs.
STANDINGS: Rockies - 4th place, 8 1/2 GB, NL West. Diamondbacks - 2nd place, 5 GB, NL West.
ROCKIES PROBABLE STARTER: Jennings (8-6, 4.40 ERA). Jennings is 2-1 with a 4.50 ERA in four career starts against Arizona.
DIAMONDBACKS PROBABLE STARTER: John Patterson (1-4, 6.45 ERA). Patterson has allowed three earned runs in each of his last four starts, but is just 1-1 over that span. The Diamondbacks, however, had won three of those outings before Wednesday’s loss to Jennings and the Rockies. The right-hander went six innings, giving up seven hits, four walks and striking out four. Patterson fell to 0-2 with a 7.20 ERA in two starts against Colorado this season. He is 1-2 with a 6.00 ERA in three career starts against the Rockies.
SEASON SERIES: Rockies, 7-3.
STREAKS AND NOTES: Rockies - OF Larry Walker, who got the day off Sunday, is one hit shy of the franchise mark of 1,278 set by Dante Bichette. … Despite going 0-for-4 Sunday, LF Jay Payton is batting .357 (10-for-28) with two homers and 10 RBIs over his last seven games. … Colorado hasn’t won a season series against Arizona since 1999. Diamondbacks - RHP Patterson hasn’t given up a homer in his last five starts, spanning 27 2-3 innings. … 3B Hillenbrand is batting .300 (9-for-30) in seven games since returning from the DL. … LF Gonzalez’s selection to the All-Star team marked the first time the Diamondbacks have had only one player on the squad since their inaugural 1998 season, when Devon White was chosen.
ROAD/HOME RECORDS: Rockies - 15-29 on the road; Diamondbacks - 24-18 at home.
INJURIES: Rockies - RHP Shawn Chacon (elbow), 15-day DL; OF Chris Richard (hamstring), 60-day DL. Diamondbacks - INF Junior Spivey (ankle), 15-day DL; INF Tony Womack (knee), 15-day DL; OF Danny Bautista (hamstring), 15-day DL; RHP Mike Koplove (shoulder), 15-day DL; RHP Curt Schilling (hand), 15-day DL; LHP Randy Johnson (knee), 60-day DL; RHP Bret Prinz (groin), 60-day DL; INF Craig Counsell (thumb), 60-day DL.