PHILADELPHIA -- Cubs manager Joe Maddon was encouraged when he saw Jason Heyward walk off the field on Thursday under his own power after injuring his right hamstring, but the outfielder was not ready to play on Friday and was placed on the 10-day disabled list.
"With hamstrings, you don't want to push it and make it something worse," Maddon said Friday. "You want to play it conservatively as you figure the whole thing out. It's definitely sore. When he walked off the field, I took it as a good sign.
"You have to be really cautious with these things because even if it's mild, you don't want it to become someting more than that, especially at this time of year," Maddon said.