http://www.suntimes.com/output/cubs/cst-spt-kiley14.html PITCHING IN: With a rotation this weekend in Pittsburgh of Sean Marshall, Jerome Williams and Glendon Rusch, one more name must be included when that group is mentioned: right-hander Angel Guzman. If any of this weekend's trio falters and the Cubs are forced to go to the minors for immediate help, Guzman tops the list right now over left-hander Rich Hill. Guzman is off to a strong start at Class AAA Iowa after pitching well in spring training. He and Carlos Zambrano are close friends, and Guzman's arrival in Chicago would put Zambrano, 24, in the position of being a guidance counselor to Guzman, also 24, in both on-field and off-field matters. I almost wish that Rusch gets rocked on Sunday but we still win in order to see him moved to the 'pen.