Séga Coulibaly was part of the massive changes brought to the LA Galaxy roster during the 2021 season. The center back arrived from French second division side Nancy in late-April, and after making his arrival and going through quarantine and all of that, he made his debut in mid-June after the league break.
Coulibaly played major minutes for most of the rest of the season, aside from most of July when he was out with an injury. Greg Vanney seemed to like the former French youth international and coming in during a point in the season when the Galaxy really needed experienced bodies in central defense, he filled a role.