Mayberry Jr. leads Phillies over D-Backs

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Arizona Diamondbacks starting pitcher Ian Kennedy walks off the mound after the Philadelphia Phillies' John Mayberry (15) hit a two-run home run in the third inning Thursday, Aug. 18, 2011, in Philadelphia. (AP Photo/H. Rumph Jr) By Horry Rumph  Jr Arizona Diamondbacks starting pitcher Ian Kennedy walks off the mound after the Philadelphia Phillies' John Mayberry (15) hit a two-run home run in the third inning Thursday, Aug. 18, 2011, in Philadelphia. (AP Photo/H. Rumph Jr) By Horry Rumph Jr

PHILADELPHIA (AP) -- John Mayberry Jr. hit a two-run homer, David Herndon tossed three scoreless innings in relief and the Philadelphia Phillies beat the Arizona Diamondbacks 4-1 Thursday night in a matchup of division leaders.

The major league-leading Phillies took two of three in a potential playoff preview, improving to 14-1-1 in their last 16 series.

A thunderstorm delayed the game for 2 hours, 17 minutes after three innings. Neither starting pitcher returned when play resumed.

Herndon (1-2) gave up one hit and struck out four to earn his second career win. Ryan Madson finished for his 23rd save in 24 tries.

Ian Kennedy (15-4) gave up three runs and five hits in three innings, failing to become the NL's first 16-game winner. He had won his previous seven starts.