For the sixth edition of his textbook “Principles of Economics,” Professor N. Gregory Mankiw has replaced an example titled “Should Tiger Woods Mow His Own Lawn?” with a scenario based on the life of NFL player Tom Brady.

“That example in Chapter 3 of the textbook used Michael Jordan in the first edition. Jordan was later changed to Tiger Woods when Jordan retired,” Mankiw wrote in an e-mail. “For the new edition, I thought all the recent events surrounding Woods’ social life might be distracting, so I changed the example to use Brady.”

Why Brady? No specific reason. Mankiw said he and his editor were “looking for a noteworthy celebrity athlete.”