Sox's Stewart slammed for four Cubs home runs
It's the location of his pitches that got the Chicago White Sox's spot starter into trouble Monday night.
Cubs have now expanded the lead to 12-3 in the bottom of the seventh.
Stewart was inserted in the rotation after John Danks was unable to pitch because of left shoulder soreness and the preference to get extra rest for Jake Peavy and Chris Sale.
Stewart had walked only four in 24 1/3 innings entering Monday night's game, but opponents were batting .314. That average will swell after Stewart allowed nine hits, including four homers.
Stewart has now allowed 10 home runs in 30 innings.
In an interesting twist, longtime reliever Brian Bruney started at Triple-A Charlotte and threw five innings of one run ball in the Knights' 5-2 win over Columbus. Bruney allowed four hits while striking out three and walking one.
It was Bruney's first start since April 9, 2008, while pitching for the New York Yankees.
His only blemish was a solo home run allowed to Ezequiel Carrera in the fifth.
Right fielder Kosuke Fukudome went 1 for 2 in his first game on a minor league rehabilitation assignment for the Knights.