San Francisco 49ers linebacker Dre Greenlaw has openly criticised his time with the Denver Broncos, saying Denver's high altitude left him "fighting demons" during his stint with the team. Greenlaw has since returned to the 49ers after being released by the Broncos, ending a brief and turbulent chapter in Denver that fell well short of expectations.

Greenlaw had signed a three-year, $31.5 million contract with the Broncos, but was released by the team roughly a year later, with injuries cited as a factor in the split. His comments highlight the physical toll that Denver's mile-high altitude reportedly took on him during his time there, before his move back to San Francisco.