San Diego (8-9) at Arizona (9-8), 9:40 pm EDT

PHOENIX (Ticker) -- An impressive pitching matchup highlights the second game of a three-game series as the San Diego Padres visit the Arizona Diamondbacks .

Jake Peavy (2-0, 1.31 ERA), the National League's ERA leader in 2004, looks to continue his stellar start for the Padres. Peavy has continued his strong pitching this year, allowing just three runs in 20 2/3 innings. Last time out, Peavy beat San Francisco, yielding just one run and six hits in seven innings.

Brandon Webb (3-0, 3.26), the first Diamondback to win his first three starts of a season since Randy Johnson went 6-0 in 2002, starts for Arizona. He allowed three runs in six innings to earn the victory Monday against Colorado. Webb owns a 1-2 lifetime mark with a 2.84 ERA in five starts against San Diego.

The Diamondbacks, who beat the Padres, 5-3, on Friday night, have alternated wins and losses for the past seven games. Brad Halsey yielded two runs in seven innings and Troy Glaus had three hits, including a homer, in the victory Friday.

The Padres are just 3-7 on the road this season.