5/30 Lineup & extra bases

Wednesday’s Cubs lineup:

DeJesus RF

Castro SS

Mather CF

LaHair 1B

Soriano LF

Stewart 3B

Barney 2B

Clevenger C

Dempster P

* Ryan Dempster will try for his first win of the season Wednesday as the Cubs close their quick homestand against the Padres. Dempster enters the game with a 2.14 ERA in eight starts, but owns a 0-3 record. His 2.14 ERA is the lowest for a pitcher winless in his first eight starts to a season since earned runs became an official statistic in 1912, according to Elias Sports Bureau.

* Dempster’s 2.14 ERA ranks fourth in the National League. The Cubs have scored an average of 1.98 runs per nine innings pitched for Dempster this season, second-lowest in the majors (San Diego’s Edinson Volquez, 1.66).  Since his most recent victory, Aug. 11 vs. Washington, Dempster has gone winless in his last 17 starts despite pitching to a 3.61 ERA. The Cubs have averaged 2.25 runs per nine innings pitched in those games.

* After an off day Thursday, the Cubs head west to San Francisco. Here are the pitching matchups:

Friday: LHP Paul Maholm (4-3, 4.62) vs. LHP Madison Bumgarner (5-4, 3.14)

Saturday: RHP Matt Garza (2-3, 4.22) vs. RHP Matt Cain (5-2, 2.79)

Sunday: LHP Travis Wood (0-1, 5.94) vs. LHP Barry Zito (4-2, 3.41)

Monday: RHP Jeff Samardzija (5-3, 3.09) vs. RHP Ryan Vogelsong (3-2, 2.36)

– Carrie Muskat