[7][8] Blackson made his first-team debut on 9 September 2016, featuring for 90 minutes at left-back in a 4–1 Eerste Divisie win over Almere City.
Commenting on the transfer, Blackson stated that it was a "boyhood dream" to play for the club, partly growing up in the town: "When I visited Yanmar Stadion with Cambuur in February, I even told Calvin Mac-Intosch about it.
[12] He made his debut for the club on 1 September 2017, replacing Kees van Buuren in the 74th minute of a 2–1 league loss against Fortuna Sittard.
[15] He scored again two months later, on 15 November, a failed cross from 30 metres out which fooled Cambuur's goalkeeper Sonny Stevens in the ninth minute to equalise.
[17] He made his debut for the club on 6 August, the opening matchday of the season, playing the full 90 minutes of a 1–1 home draw against Emmen.