|Date of birth||3 April 1993|
|Place of birth||Chandigarh, India|
|Height||1.75 m (5 ft 9 in)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 19 April 2015.
Kumar made his professional debut for Pailan Arrows on 19 September 2012 against Dempo S.C. in the first match of the 2012 Indian Federation Cup where Pailan drew against the reigning I-League champions 1–1. Kumar scored his first ever goal of his career on 12 January 2013 against Air India FC in the I-League at the Balewadi Sports Complex in Pune to help Pailan Arrows draw the match 1–1.
Kumar signed for United S.C. in January 2014. He made his debut on 14 January 2014 in the Indian Federation Cup match against Churchill Brothers at Jawaharlal Nehru Stadium, Kochi in which he came on as a substitute for C. K. Vineeth in the 63rd minute as United lost the match 2-1.
- As of 17 January 2013
|Club||Season||League||Federation Cup||Durand Cup||AFC||Total|
- "Rajinder Kumar". Goal.com.
- Vaz, John. "Pailan Arrows 1-1 Dempo SC: Arrows hold the Goan heavyweights to secure a point". Goal.com. Retrieved 25 December 2012.
- Srivastava, Ayush. "Air India 1-1 Pailan Arrows: An inspired Soram Poirei helps Pailan Arrows grab a point". Goal.com. Retrieved 13 January 2013.
- "Churchill Brothers SC 2-1 United Sports Club: The Goan side held on to get off to a winning start". Goal.com. Retrieved 21 January 2014.
- Rajinder Kumar at Soccerway