Rivers attended Freedom High School in Oakley, California, where as a senior in 2016, he was named Bay Valley League Most Valuable Player, East Bay Offensive Player of the Year by the San Jose Mercury News, and All-NorCal Offensive Player of the Year by MaxPreps, and All-North Coast Section Player of the Year by Prep2Prep. During his senior season, Rivers rushed for 2,239 yards and scored 33 touchdowns while posting 100-yard plus rushing performances in 11 of 13 games, breaking numerous school rushing records previously held by Joe Mixon. His efforts led the Falcons to an 11-2 record and a runner-up finish in the CIF-North Coast Section Open Division in 2016.[1]
Rivers was signed as an undrafted free agent by the Arizona Cardinals on May 2, 2022.[4] He was released on August 14, 2022.[5]
Seattle Seahawks
On August 24, 2022, Rivers was signed by the Seattle Seahawks.[6] He was waived on August 28.[7]
Los Angeles Rams
On September 15, 2022, the Los Angeles Rams signed Rivers to their practice squad.[8] He was promoted to the active roster on November 26, 2022.[9] He appeared in nine games as a rookie, rushing nine times for 21 yards and catching five passes for 29 yards.[10]
Rivers entered the 2023 season as the Rams third running back. He suffered a knee sprain in Week 6 and was placed on injured reserve on October 18, 2023.[11] He was activated on December 21 and finished the season with 32 carries for 129 yards and five receptions for 22 yards.[12]