"He's going to be in the bullpen, and we'll make an announcement regarding what we're going to do tomorrow at some point," Maddon said.
One possibility is left-hander Tsuyoshi Wada could join the rotation. Wada, whose rehab assignment is expiring, has been on the disabled list since March 27 for a mild left groin strain. Maddon said the Cubs were discussing what to do with the starter.
Wada is 1-3 with a 2.86 ERA in six starts at Triple-A Iowa. He allowed a run and struck out six in seven innings in his last start Thursday against Nashville. Last season, he went 4-4 with a 3.25 ERA in 13 starts with the Cubs.
Wood pitched a 1-2-3 ninth inning with two flyouts and a popout in his fifth career relief appearance and first since Sept. 17, 2011, against Milwaukee. He has a 0.00 ERA in six relief innings. Four of his bullpen appearances were with the Reds in 2011.
Wood, an All-Star in 2013, is 2-2 with a 5.59 ERA this season. He allowed five runs in 4 1/3 innings against the Mets on Thursday in his last start.