Miami Dolphins quarterback Tua Tagovailoa (1) is assisted off the field during the first half of a game against the Buffalo Bills Sept. 25, 2022, in Miami Gardens. (AP Photo/Rebecca Blackwell)
Dr. Allen Sills, the league's chief medical officer, said the increase comes from a protocol change that "broadened and strengthened" the definition of concussions following injuries suffered by Miami Dolphins quarterback Tua Tagovailoa in a four-day span.
Tagovailoa suffered a lower-back injury that left him wobbly in Week 3. The Dolphins played Week 4 on "Thursday Night Football," and he suffered a concussion that sent him to a hospital.
Teammates gather around Miami Dolphins quarterback Tua Tagovailoa after an injury during the first half of a game against the Cincinnati Bengals Sept. 29, 2022, in Cincinnati. (AP Photo/Emilee Chinn)
"We continue to become more cautious and conservative in our evaluation and diagnosis of concussions," Sills said, via ESPN. "That's not just an opinion. That's backed up by the data."
Independent spotters and on-field officials performed nearly twice as many medical evaluations this year than last.
The NFL logo on the field before a game between the Arizona Cardinals and the Los Angeles Rams at SoFi Stadium Oct. 3, 2021, in Inglewood, Calif. (Katelyn Mulcahy/Getty Images)
The NFL did see its lowest number of training camp concussions in eight years with just 25. Players wore extra helmet protection during the summer practices.