A Marin County couple and their son who are relatives of former San Francisco Giants pitcher Tyler Walker are among dozens of flood victims missing in Central Texas.
Friends and relatives identified the missing Kentfield family as Mark Walker, 51; Sara Walker, 50; and Johnny Walker, 14. Their 16-year-old daughter, Ellie, was safe.
Mark’s mother, Kathy Walker, said she last heard from her older son and his family Thursday. Kathy’s younger son, Tyler, was a major league baseball player whose long career spanned five teams, including the Giants from 2004 to 2008…