What happened: Former San Francisco 49ers star linebacker Aldon Smith passed away on Saturday at the age of 36. The 49ers organization confirmed the news on Sunday, describing his passing as sudden and tragic while expressing condolences to his family.

Why it matters: Smith was one of the most dominant defensive forces in the league during his peak, helping lead San Francisco to three consecutive NFC Championship appearances and Super Bowl XLVII. His early-career production remains among the most prolific in NFL history, though his tenure was later curtailed by off-field challenges.

What to watch: No cause of death has been publicly disclosed as of Sunday afternoon. The 49ers are expected to share further memorial details as the NFL community mourns the loss of the former All-Pro.