Sproles, who recently announced he would return for his final season after suffering an ACL injury in 2017, spent three seasons in New Orleans, where he amassed 3,048 yards of total offense and 21 touchdowns (16 receiving).
Luck returns from a shoulder injury, and Brees, who dealt with a shoulder injury in 2005, understands what the Colts signal-caller has endured on the road to recovery after missing the 2017 season.
"I know it's extremely difficult, any type of injury to the throwing arm, especially what appears to be the extent of Andrew's," Brees told the radio station. "And, obviously, that's been a long road for him and a really tough road. But I think by all accounts Andrew, especially this offseason, has really worked his tail off to get back to where he's going to be able to compete at a high level."