[11] During Week 2 against the Oakland Raiders, Hardman caught four passes for 61 yards and his first NFL touchdown in the 28–10 road victory.

[12] In the Week 3 game against the Baltimore Ravens, he caught two passes for 97 yards including an 83-yard receiving touchdown.

[15] In the regular-season finale against the Los Angeles Chargers, Hardman caught a 30-yard reception and returned a kickoff for a 104-yard touchdown in the 31–21 win.

[18] During a Week 3 game against the Ravens, Hardman caught four passes for 81 yards including a 49-yard touchdown; the Chiefs won 34–20.

[19] In a Week 8 35–9 victory against the New York Jets, Hardman caught seven passes for 96 yards including a 30-yard touchdown.

[21] Hardman missed no games while on the reserve/COVID-19 list, but his snaps were limited in the Chiefs' Week 11 victory against the Las Vegas Raiders.

[26] In the 2021 season, Hardman played in all 17 games and recorded 59 receptions for 693 yards and two touchdowns while handling a majority of the punt return duties.

[34] However, he only caught one pass in five games with the Jets and lost his starting spot to two rookie wide receivers before asking to be traded.

[37][38] In the ensuing offseason Hardman entered free-agency, and ultimately returned to the Chiefs after signing a one-year, $1.125 million contract on June 7, 2024.

On January 22, 2025, Chiefs head coach Andy Reid announced that Hardman will not return from injured reserve due to his knee injury and will miss the remainder of the season.

[45] He made a guest cameo as himself on 2024 Hallmark Channel original film, Holiday Touchdown: A Chiefs Love Story.