Bumps and bruises, even broken bones and torn muscles are a part of football. Those are the typical risks that come with playing the sport at any level.

So while several Michigan State players were dealing with those issues last season, there was one who went through a much more severe situation in 2016. One that’s almost unimaginable for a college athlete.

On Thursday morning, Spartans CB Tyson Smith revealed he suffered a stroke a year ago, making the announcement via Twitter:

There were no further details regarding the stroke or when it happened. Michigan State kept Smith’s condition a secret until the CB made the announcement six months after the season ended.

And he just so happened to make the announcement on his birthday.

Smith played in eight games for the Spartans as a sophomore, recording 13 tackles, 1.5 stops for loss and four pass break-ups. He missed the final three games of the year, but Mark Dantonio didn’t disclose a reason why Smith was absent.

Smith is expected to be competing for a starting CB job in 2017.