Previously, Roundshaw and the Pirates have been hosts to the yearly London Tournament and on occasions the BBF's National Finals.

The club was formed around 1980 by Eric Petrie and Pete Paulley, who had previously played for the Croydon Blue Jays.

The first team played as the Croydon Borough Pirates and placed 3rd in the 1981 Southern England Baseball Association (Group B) division with a 5–11 record.

After being runners-up to the Richmond Flames in 2006, their 2007 regular season record of 26 wins and 0 losses earned them the right to compete in the Final 4 tournament for the 4th consecutive year, on the weekend of 1–2 September 2007 along with the London Mets, Menwith Hill Patriots and Liverpool Trojans.

In 2008, this P3 team again won their British Baseball single-A division, finishing the season with a record of 10 wins and 2 losses.

The season, shortened due to COVID-19, saw the team competing in a series of double-headers throughout August, finishing 4th with a 3–4 record along with one rained-off game.

Open to a variety of teams from around the British leagues, the popular weekend-long competition has also included a Home Run Derby.