Three Irish rugby players, including two former internationals, have lodged High Court proceedings against the IRFU, World Rugby and their former provinces. Declan Fitzpatrick, who played 98 times for Ulster between 2006 and 2015, has lodged filings against Ulster Rugby, the IRFU and World Rugby. He retired after suffering a number of concussions. Ben Marshall, who played 20 times for Leinster before joining Connacht, has lodged filings against Leinster Rugby, Connacht Rugby, the IRFU and World Rugby. He retired at the age of 26 in 2017 on medical advice. David Corkery, who played 27 times for Ireland between 1994 and…