Spencer said he will get days off during the season until his knee feels better.
Team officials described Spencer's knee surgery as minor.
"I have like soft cartilage on the inner side of my knee that's causing [the pain]," Spencer said. "It's not stopping the banging of the bone. It's going to take a little bit more time to heal, and we really don't have time right now."
When you hear about banging of bones in the knee, it raises questions about the long-term health of a player and whether the cartilage is gone. Microfracture surgery is a procedure that creates fractures in the bone to develop new cartilage.
But Spencer said he doesn't need it.
More:
http://espn.go.com/blog/dallas/cowb...y-spencer-reveals-info-about-his-knee-surgery