Cubs manager Rick Rick Renteria on keeping Starlin Castro at cleanup.

All games on WGN-AM 720.

Season series: Phillies 2-1.

Friday: 6:05 p.m. WGN-9.

RH Jake Arrieta (1-1, 2.50) vs. RH Roberto Hernandez (2-4, 4.35).

Saturday: 2:05 p.m. CSN.

RH Edwin Jackson (4-6, 4.70) vs. RH David Buchanan (1-3, 6.08).

Sunday: 12:35 p.m. WGN-9.

LH Travis Wood (6-5, 4.95) vs. RH A.J. Burnett (3-5, 4.24).

Who's hot: Entering Thursday, Luis Valbuena is 7-for-13. Hector Rondon has not surrendered a long ball in his last 451/3 innings dating to Aug. 3 of last season, tied for the seventh-longest current stretch in the majors. The Phillies have won three consecutive games. Jimmy Rollins has a seven-game hitting streak.

Who's not: Mike Olt is 0-for-19. Chris Coghlan is 1-for-9. David Buchanan has allowed 11 runs and three home runs in his last 12 innings. Roberto Hernandez has failed to pitch at least six innings in his last three starts.