SAN DIEGO -- Chargers quarterback Philip Rivers continues to make progress from a late-season foot injury and should be out of a walking boot by the end of this month.

Rivers injured his right foot in the regular-season finale against Arizona on Dec. 31 and aggravated the injury two weeks later in the playoff loss to New England. He had to miss the Pro Bowl because of the injury.

"He's making great progress with his foot," Chargers coach Norv Turner said Thursday. "He's upbeat about the whole deal. He's in every morning working out. The good thing is he's in here working out every day, so I get to stop in and see him and visit with him."

The Chargers begin their voluntary offseason workout program on March 19. Rivers figures to become a full-time participant in mid-to-late April.

"The time schedule is based on how he comes along," said Turner, "but it's not an issue."