Anderson ran 1:45.02 at the
NCAA Championships final at
Hayward Field to break the Jamaican
national record over 800 metres and finish runner-up to
Moad Zahafi in June 2022. He was subsequently called up to represent his country at the
2022 World Athletics Championships held in
Eugene. He finished seventh in his heat at the Championships. Anderson made his first senior final at the
2022 Commonwealth Games in the 800 metres, held in
Birmingham, England. He finished fifth in the final running 1:48.75. Anderson lowered the Jamaican 800m indoor record in February 2023 at the Music City Challenge at
Vanderbilt University in Nashville, United States, running a time of 1:46.58. On July 30, Anderson lowered his own Jamaican 800m record to 1:44.70. At the
2023 World Athletics Championships in
Budapest, Anderson competed in the 800m. He won bronze at the
2023 Pan American Games in
Santiago, Chile in November 2023. He competed in the 800 metres at the
2024 Summer Olympics in Paris in August 2024. In June 2025, he lowered the Jamaican national record for the 800 metres to 1:44.61 in
Baltimore. He finished runner-up in the 800 metres final at the 2025 Jamaican Athletics Championships in 1:46.03. He won the 800 metres at the Sunset Tour Los Angeles on 12 July 2025 in 1:44.40. He was named in the Jamaican squad for the
2025 NACAC Championships in
Nassau, The Bahamas, running 1:44.18. He was a finalist at the
2025 World Athletics Championships in
Tokyo, Japan, in September 2025 in the
men's 800 metres, breaking the national record twice. In the semi-finals he ran a new personal best and national record of 1:43.72 to become the first Jamaican man to qualify for the final of the event, before lowering the national record to 1:42.76 as he finished in seventh place overall. On 22 February, Anderson improved the national indoor record to 1:44.75 at the Copernicus Cup in Toruń. He reached the semi-finals representing Jamaica over 800 m at the
2026 World Athletics Indoor Championships in
Toruń, Poland. ==References==