Dallas Cowboys quarterback Tony Romo is progressing well from back surgery and has started the first phase of exercises, according to multiple sources.

Romo underwent a discectomy to repair a herniated disk on Dec. 27. He was home the same day and attended exit meetings at Valley Ranch two days after surgery.

Cowboys officials, including owner Jerry Jones and coach Jason Garrett, said last month that Romo had experienced relief from the surgery and was on target to be ready for the start of offseason team activities in the spring.

According to a source, Romo is currently doing core and stabilization exercises, parts of the first phase of rehab after back surgery.