Chandrasekara Arachchilage Kasun Rajitha is a right-arm medium-fast bowler who has represented Sri Lanka across all three formats since 2016. Standing at 1.94 meters, Rajitha is known for his ability to generate appreciable seam movement at a sharp pace, making him a valuable asset in various playing conditions.​

Rajitha's international debut came in a T20I against India on February 9, 2016, in Pune, where he made an immediate impact by taking two wickets in his very first over, including those of prominent top-order batters. This performance earned him the Player of the Match award and marked a promising start to his international career. He made his Test debut on June 14, 2018, against the West Indies, and his ODI debut followed on August 1, 2018, against South Africa.​

Throughout his career, Rajitha has been a consistent performer for Sri Lanka. In May 2022, he achieved his first five-wicket haul in Test cricket, taking 5 for 64 against Bangladesh, showcasing his ability to lead the bowling attack. Despite facing challenges, such as conceding 75 runs in a T20I against Australia in October 2019, the most expensive figures in T20I history then, Rajitha demonstrated resilience and continued to contribute to the national team.​

Domestically, Rajitha has played for Badureliya Sports Club and was a leading wicket-taker in the 2018 SLC T20 League, finishing with 13 dismissals in six matches. In April 2025, he signed with Essex County Cricket Club to participate in their County Championship campaign, reflecting his growing reputation in international cricket circles.