Indianapolis Colts quarterback Andrew Luck is expected to begin practicing as early as this week, a major step toward his eventual return to the playing field, according to sources familiar with Luck's rehabilitation from shoulder surgery in mid-January.

Sources say Luck will likely require two to three weeks of preparation for his first start of 2017, which would project a potential return around Weeks 5 to 7, barring any setbacks.

Regardless, the Colts are sticking with their edict that there is no specific timeline or deadline.

Luck's quest to return has included a phone call within recent weeks to New Orleans Saints quarterback Drew Brees, who shared his experience in recovering from a major shoulder injury in 2006. That conversation led to Luck paying a visit to Brees' physical therapist, Dr. Kevin Wilk, in conjunction and cooperation with the Colts' hierarchy and medical staff, sources said.