| Patrick Cassidy | |
| Birth Date: | 1887 |
| Birth Place: | Wallsend, England |
| Position: | Centre half |
| Clubs1: | South Shields |
| Years2: | 1911–1912 |
| Clubs2: | Bradford City |
| Caps2: | 4 |
| Goals2: | 0 |
| Years3: | 1912–1920 |
| Clubs3: | Cardiff City |
| Caps3: | 89 |
| Goals3: | 11 |
| Totalcaps: | 93 |
| Totalgoals: | 11 |
Patrick Cassidy (born 1887) was an English professional footballer who played as a centre half.
Born in Wallsend, Cassidy played for South Shields, Bradford City.[1] For Bradford City, he made 4 appearances in the Football League.[2] In 1912, Cassidy joined Southern Football League Second Division side Cardiff City, making his debut in a 1–0 victory over Mid Rhondda on 12 September. He helped the side to win the title and promotion to the First Division in his debut season.[3] His defensive partnership with Billy Hardy and Kidder Harvey led the trio to be given the nickname of the "holy three" by the club fans. The emergence of a young Fred Keenor following the end of World War I saw Cassidy come under pressure for his place in the side and, following Keenor's strong performances during pre-season matches prior to 1919–20 season, Cassidy himself pushed for Keenor to be included in the first-team in his place due to his "youth and promise".