"We'll leave it at that right now," Sandberg said.
There are benefits to shutting down Kendrick for 2013. He said the soreness in his shoulder will cure with rest. It is something he can pitch through and did so for five weeks, but his performance was affected.
Kendrick said he did not want to make excuses. He pointed to a career-high 182 innings as a potential cause. He served as a starting pitcher for a full season for the first time since 2010. That, too, could have caused the injury.
"To get rid of it, you need to not throw and rest," he said. "But to know what it is and know I can still pitch with it, I might as well make the last two starts. Try to get a couple of wins."
Kendrick's next scheduled start is Tuesday in Miami. That would put him in line to pitch the season finale Sept. 29 at Atlanta.
He has a 6.91 ERA since the all-star break after a 3.68 first-half mark fostered more hope of his becoming a mid-rotation mainstay. Kendrick is eligible for arbitration this winter.
"It's obviously frustrating," Kendrick said. "You want to pitch well every time you're out there. My second half is not what I've wanted, what the organization wanted, nor what the fans wanted."
Former Phillies shortstop and manager Larry Bowa, now an MLB Network analyst, was a ballpark guest Thursday. He held court in the dugout and spent time behind the batting cage with Sandberg, a close friend. If Sandberg is retained, Bowa would be a strong candidate for his coaching staff. . . .
Third-base coach Juan Samuel left the team to address a personal issue. He will return Saturday. Triple-A manager Dave Brundage is coaching in Samuel's absence.