A left-arm fast bowler by trade, he has a healthy bowling average in both first-class and List A cricket, in the mid-to-low 20s.
On 6 April 2015, Welagedera recorded the best economical spell of Twenty20 cricket history against Sinhalese Sports Club.
An alumnus of St. Thomas' College, Matale, he proved the future prospects of entering national side with his bowling performances in school level.
A left-arm fast bowler by trade, he has a healthy bowling average in both first-class and List A cricket, in the mid-to-low 20s.
He was included in Sri Lanka's One Day International squad to play against India in December 2009, making his debut on 15 December in Rajkot, and in a match where 825 runs were scored in 100 overs, he returned figures of 2/63 from his ten overs, claiming the wickets of Virender Sehwag and Virat Kohli.