Lackey (shoulder) will throw a bullpen session Thursday and hopes to start on Sunday, Carrie Muskat of MLB.com reports.

EDGE Analysis

Lackey hurled quality starts in each of his last five outings before going on the DL on August 19, but the Cubs don't want to push him with a playoff berth all but assured. If he doesn't report any shoulder soreness after Thursday's bullpen, he'll be all set to go this weekend.