In the 1950's and 60's, it was common for local papers to provide scorecards to it's readers. I assume, many people used them to keep score while listening to games on the radio.
The Baltimore Sun issued two styles over the years. The first style was more like a booklet that could be used to score many games. They weren't dated, but the covers varied over time.
1957 Sunpapers Scorebook.JPG 1960's Sunpapers Scorebook #1.jpg
1960's Sunpapers Scorebook #2.jpg 1960's Sunpapers Scorebook #3.jpg
The second type were scorecards for individual games and included rosters on the back. They were printed from 1960-67. The covers didn't change much over the years. There were some color changes, but often the best way to determine the year are the rosters on the back. Since rosters changed during the summer, most years have a variety of backs. I posted a scan of two different 1965 backs. A friend of mine went through all of the Orioles roster moves each year and can actually give you the date range from each back.
1960
1960 Sunpapers.jpg
1961
1961 Sunpapers.jpg
1962
1962 Sunpapers.jpg
1963
1963 Sunpapers.jpg
1964
1964 Sunpapers.jpg
1965
1965 Sunpapers.jpg
1965 Sunpapers #1.jpg 1965 Sunpapers #2.jpg
1966
1966 Sunpapers.JPG
1967
1967 Sunpapers #2.jpg