Max Leetzow wore number 81 while on the Broncos in 1965 and 1966. If you look at the name on the back of the jersey on this card you can see it is not Leetzow. Most likely this is a picture of Max Leetzow wearing Don Shackelford's number 65 Jersey, possibly just for this picture. Don Shackelford was part of the 1964 Broncos team but is not found as being part of the 1965 team, however he can be seen in the team photo from 1965.