Youth and Early Born in Gurdaspur, Punjab, Kumar has played with several I-League clubs like JCT, Air India, and Salgaocar. While with JCT, Kumar led the side to the 2010 Durand Cup final where his side lost 1–0 to Chirag United at the Ambedkar Stadium. Then, for the 2011–2012 season, after JCT disbanded, Kumar played with Air India, another I-League, side for the season.
Then, for the 2012-2013 season, Kumar played with Salgaocar where he found himself as the #2 behind Karanjit Singh.
Kumar only played in one match while with the club against Sporting Goa on 20 March 2013 in which he came on as a 63rd-minute substitute after Karanjit Singh was red carded. Salgaocar lost the match 1–3.
Bengaluru Football Club
On 21 July 2013, during the launch of new direct-entry I-League club, Bengaluru Football Club, Kumar was announced as one of the players signed on to the club for the new season. Kumar then made his debut for Bengaluru in the club"s very first I-League match ever against Mohun Bagan A.C. (before Christ) at the Bangalore Football Stadium in which he started and played the full match as the match ended 1–1.
In December 2015, Pawan joined Mumbai F.C. for 2015-2016 I-League.