"At the end of the day, I know [Tom Brady's] gonna do what's best for his health," Harrison said.
Harrison's comments come after Brady's wife, Gisele Bundchen, revealed the five-time Super Bowl champion suffered a concussion during the 2016 season.
"As you know, it's not the most, like—let's say 'unaggressive' sport. Right?" Bundchen said on CBS This Morning. "Football, like, he had a concussion last year. I mean, he has concussions pretty much every—I mean, we don't talk about—but he does have concussions."
"We have reviewed all reports relating to Tom Brady from the unaffiliated neurotrauma consultants and certified athletic trainer spotters who worked at Patriots' home and away 2016 season games as well as club injury reports that were sent to the league office," a league spokesman said, per ESPN.com news services. "There are no records that indicate that Mr. Brady suffered a head injury or concussion, or exhibited or complained of concussion symptoms."
Citing STATS LLC, ESPN.com reported the 39-year-old has never been listed on an injury report with a concussion or head injury over the course of his 17-year career.