He played college football for the Hawaii Rainbow Warriors[1] and Wisconsin Badgers.

[2] Nelson was selected by the Oakland Raiders in the fourth round (110th overall) of the 2018 NFL draft.

[3] On August 31, 2019, Nelson was waived by the Raiders and re-signed to the practice squad.

[7] On May 18, 2020, Nelson was waived by the Raiders with a failed physical designation,[8] and reverted to the team's reserve/physically unable to perform list the next day.

[10] On January 5, 2021, Nelson signed a reserve/future contract with the Indianapolis Colts.