Blum played professional baseball for the Pittsburgh Pirates and the Chicago Cubs Organizations.
The contest was notable because both teams, the game officials and other field-level personnel spent the entire second half dodging snowballs hurled by unruly fans.
When he picked up a telephone on the Chargers' sidelines to make a call to request that a verbal warning to the crowd be made over the public address system, a snowball narrowly missed hitting him.
Instead it struck Chargers equipment manager Sid Brooks, who was knocked unconscious and had to be removed from the sidelines on a stretcher.
[1] After retiring from officiating, Blum was asked to be an aid in television broadcast explaining calls, etc., he opted instead to join the San Francisco 49ers coaching staff, where he advised Coach Mike Singletary on when to challenge calls for two seasons.