Oakland Raiders head coach Jon Gruden announced on Monday that the Raiders have released linebacker Brandon Marshall, per Josh Alper of Pro Football Talk.

The move comes just days after the Raiders brought him back.

Marshall was not active for Oakland's win over the Detroit Lions on Sunday.

The Raiders initially signed Marshall back in March but eventually released him at the end of August.

Marshall, who played his collegiate football at the University of Nevada, was originally selected by the Jacksonville Jaguars in the fifth round (142nd pick overall) of the 2012 NFL Draft.

The 30-year-old played in just five games during his rookie campaign, failing to log a statistic. He then made this way to the Denver Broncos in 2013, and by 2014, he was a key piece of their defense, racking up 119 tackles, a couple of sacks, an interception, a pair of forced fumbles and nine passes defended.

Marshall went on to spend six seasons with the Broncos, registering over 100 tackles three times. He was also a part of a dominant Denver defense that won the Super Bowl during the 2015-16 campaign, posting 101 tackles, 1.5 sacks, a pick and two forced fumbles that year.

However, in two of his final three seasons in Denver, Marshall dealt with injury issues, and in 2018, he appeared in just 11 contests, finishing with a mere 42 tackles in what ended up being his final season in the Mile High City.

The Raiders improved to 4-4 with their win over the Lions and will host the Los Angeles Chargers in a pivotal AFC West clash on Thursday.