Why do the 49ers all wear numbers 34 and 35 on their helmut's?
To honor an old player that died this year named Joe "the Jet" Perry. Those were his jersey numbers during the years he played for them
It is in honor of a former American fullback Fletcher Joseph "Joe" Perry who passed on in April 25, 2011. He played for the San Francisco 49ers between 1948 and 1963.