Given the strength of his New England Patriots teams once upon a time, North Carolina coach Bill Belichick has had to think about resting starters a lot during his coaching career. The conversation dominating the NFL world this week—to rest or not to rest—is not new to him.

During an interview with Chargers head coach Jim Harbaugh, the subject of resting starters at the end of the regular season came up. Asked about the subject, Harbaugh — whose Los Angeles team has secured a wild card berth but cannot overtake the Chiefs to win the division — gave some concise reasoning.

The football world is still turning over the recent decision by seven-time Super Bowl champion Bill Belichick to spurn the NFL and take over as head football coach at the University of North Carolina.