Tedy Bruschi, like many around the NFL, is concerned about the findings of the research performed on Aaron Hernandez’s brain.

Jose Baez, Hernandez’s lawyer, and Boston University’s CTE Center announced Thurday that the former New England Patriots tight end was dealing with “severe” CTE when he committed suicide in prison earlier this year. And Bruschi, during an appearance on ESPN’s “First Take” on Friday, admitted that Hernandez’s diagnosis has him worrying about his own health.

Watch the former Patriots linebacker explain in the video below:

Bruschi’s concerns are justified, and not just because of Hernandez’s brain.

Given everything we’ve learned in recent years about how contact sports, like football, can negatively affect the brain, players should monitor their cognitive performance closely. And Bruschi, though not necessarily connected, has a history with brain troubles, as he suffered a mild stroke in 2005.

Thumbnail photo via Kirby Lee/USA TODAY Sports Images