A look at what's happening all around the majors today:
SOUTH SIDE SHOWDOWN
Cubs ace Jake Arrieta (12-4, 2.60 ERA) takes the hill in the opener of a two-game interleague series at the crosstown-rival Chicago White Sox. Arrieta is 2-0 with a 2.75 ERA in three starts against the White Sox as a member of the Cubs. The rested Cubs are in the middle of a five-game trip in which they did not need to board a plane — they took a bus to Milwaukee for their three-game series against the Brewers. Miguel Gonzalez (2-5, 4.41) is up for the White Sox.
The Giants return home to face the Reds following a 1-7 road trip. Right-hander Jake Peavy (5-8, 5.15)...