Former NFL linebacker Keith Mitchell, an All-American in college and a Pro Bowl selection in the NFL, has died at age 51. Multiple outlets report that his death was sudden and unexpected, citing statements from his family to KBTX. The articles note that specific details about the cause of death have not been publicly provided. Mitchell’s career included recognition at the college level as an All-American and later earned him a Pro Bowl selection during his time in the NFL. The family statement is the primary information currently available, and both reports emphasize the lack of confirmed medical or other circumstances regarding how he died. No additional verified information about an investigation, location of death, or timeline of events is included in the provided coverage.