it's hard to believe, but pitchers can be streaky too.... they're mostly strike out pitchers, so they do get scored on alot, but the team makes up for it with the bats, so their ERA is like...5.50 but they still get the win...
with that being said, Cubs starters' ERA is 3.69 combined, whereas the brewers' starters are at 4.24... that's not very good, and certainly isnt at the top 5 even...