|Batting style||Right-hand bat|
|Bowling style||Right-arm fast-medium
|Source: , 9 February 2006|
During a career often blighted by injury, Ratnayake was a strapping right arm fast-medium bowler who was capable of swinging the new ball and generating considerable pace and bounce. He was also a more than useful hard-hitting lower order batsman, as Test match fifties against Pakistan and England testify.
One of his best performances came in the 1985/86 series against India, taking 20 wickets at 22 for the series. In the 2nd Test he managed 9 wickets in the match which gave Sri Lanka a rare Test win, and inaugural series victory. Other good hauls include 6 for 66 against Australia at Hobart in 1990/91 and 5 for 69 against England at Lords.
In July 2001 Ratnayake became the administrative team manager for the Sri Lankan national cricket team.
In 2003 Ratnayake was a development officer for the Asian Cricket Council and was a coach and selector for the Asian Dream Team, a composite team of lesser Asian cricketing nations that played 6 matches in Sri Lanka that year.
Ratnayake was in May 2007 linked with the Sri Lankan national cricket team assistant coaching job with some saying he had been given the interim coaching job. Ultimately it was the deputy's job that he was offered, and later declined in June 2007.:
He has also recently offered his skills advising cricket hopefuls in Canada
In August 2011, he became the head coach of Sri Lankan national team.
- Rediff.com July 25th, 2001 Retrieved on June 17th, 2008
- Monsoon Rains force Reschedule Cricinfo.com, July 18th, 2003 Retrieved on June 17th, 2008
- Retrieved on June 17th, 2008
- Rumesh to take over as assistant coach Sunday Times newspaper (Sri Lanka) Sunday May 20th, 2007 Retrieved on June 17th, 2008
- Rumesh Ratnayake: Interim Coach of Sri Lanka SouthAsiabiz.com, May 20th, 2007 Retrieved on June 17th, 2008
- Whither the future, Marvan, Rumesh? The Sunday Leader Vol. 14 Issue 2, July 1, 2007 Retrieved on June 17, 2008
- Ratnayake conducts camp Caledon Enterprise newspaper (Ontario, Canada), June 5th, 2008 Retrieved on June 17th, 2008
-  Cricinfo.com, Aug 3rd, 2011 Retrieved on Aug 3rd, 2011