Carlos Silva had a cardiac ablation procedure today to fix his recurring irregular heartbeat - similar to what Mark DeRosa had in spring 2008 - and could be back on a mound for the Cubs by September.
Silva underwent the outpatient procedure after Monday's scheduled diagnostic identified the need, and he's expected to be able to resume like cardio work and shoulder exercises right away. He could be throwing from a mound by sometime next week, with a probable rehabilitation to follow soon after.
In other Cubs news today, the team is without first-baseman Derrek Lee, as well as manager Lou Piniella, in San Francisco because of illnesses in the family.
Piniella is home in Tampa, where his mother has been hospitalized in recent days.
Lee drove to his hometown of Sacramento today because his grandfather has fallen ill. It hasn't been determined how long he'll be away from the team.
Xavier Nady takes Lee's place in the No. 3 spot in the order and at first base. Tyler Colvin is back in the leadoff spot after two days out of the lineup.
Geo Soto, who has been bothered by a sore shoulder, is also back behind the plate, batting eighth.
Oh, and Carlos Zambrano is batting ninth, and pitching.