Pirates open at Wrigley:
LF Tabata
2B Walker
CF McCutchen
1B Morneau
RF Byrd
3B Alvarez
C Martin
SS Mercer
RHP Morton
Cubs
Starlin Castro SS
Luis Valbuena (L) 3B
Anthony Rizzo (L) 1B
Dioner Navarro (S) C
Nate Schierholtz (L) RF
Ryan Sweeney (L) CF
Brian Bogusevic (L) LF
Darwin Barney 2B
Jeff Samardzija RHP