"Garza will not start tomorrow," Cubs manager Mike Quade said. "He has a little stiffness in his elbow. We are going to be real careful with this guy. We are going to skip his start."
Quade won't know the prognosis on Garza until he gets the doctor's report, but on Saturday he was hopeful that Garza wouldn't miss more than one turn in the rotation.
"It sounds like it's not something serious," Quade said. "It sounds like he could make his next start. We have the off-day [Monday] and then we have four guys to make starts. I'd literally say this is day to day for him."
Lefty reliever James Russell will take Garza's spot on Sunday and the Cubs could bring up someone from Triple-A to change their bullpen mix.
The Cubs considered bringing Randy Wells to Boston because of the fact that he's due to throw a second rehab start in Iowa on Sunday. Quade, however, said that it's too soon for Wells.
"I thought about that," Quade said. "My first thought was, 'get him up here'. But he's not ready. It's just not the right thing to do."
Garza has never experienced any prior arm injuries, according to Quade.
"He had a great side session two days ago," Quade said. "In fact, they cut it short, because they loved it. He felt a little tenderness yesterday and it was a little tight today. Done. We are not taking a chance."
Bruce Levine covers the Cubs for ESPNChicago.com and ESPN 1000.