The San Francisco Giants look to use a return home to bolster their pursuit of the NL West lead, but their difficult schedule isn't ceasing. The Giants open their homestand Tuesday night against a short-handed Chicago Cubs team seeking to pad its sizable lead on a playoff berth while Jake Arrieta attempts to become MLB's first 16-game winner. San Francisco (66-58) batted .226 with 16 runs while going 2-5 on the road against two of the NL's best teams, St. Louis and Pittsburgh.