|Full name||Len Aiyappa Ballachanda Madappa|
|Born||31 March 1979|
|Height||5 ft 8 in (1.73 m)|
|2005||Telekom Malaysia HC|
|2005 - 2008||Bangalore Hi-Fliers|
|2012 - present||Karnataka Lions||12||(13)|
|? - 2005||India|
|Infobox last updated on: 17 January 2013|
Len Aiyappa (born 31 March 1979) is an Indian professional field hockey player. He remained one of India's best drag-flickers until he retired from the national team following a fallout with the Indian Hockey Federation in 2006. He last played for India during the Sultan Azlan Shah Cup in 2005.
Aiyappa, playing for Karnataka Lions in the inaugural season of the World Series Hockey became the top scorer for the team and third overall, scoring 13 goals in 12 games. He joined the team on the insistence of Dhanraj Pillay and the coach of Karnataka Lions, Jude Felix and scored a hat-trick in the game against Chandigarh Comets.
- "2004 Olympics Athens: Player's Profile".
- "Hockey: Len gives up on India". The Times of India. 2006-02-09. Retrieved 2013-01-17.
- "Jothi ruined many careers: Len". indianhockey.com. 2008-04-25. Retrieved 2013-01-17.
- "Did it for my mother: Len Aiyappa". The Times of India. 2012-03-08. Retrieved 2013-01-17.