Former Denver Broncos and Arizona Cardinals safety Hamza Abdullah recently removed many of the tweets he posted during an expletive-laden rant against fellow Muslims and the National Football League on Thursday.

In many of his now-deleted tweets, Abdullah attacked the NFL and commissioner Roger Goodell for the way the league handles injuries and many other issues, as per the Associated Press (via ESPN).

According to Chris Strauss of USA Today (via AZCentral.com), Abdullah went so far as to describe the NFL combine as a "slave trade" and the league itself as a "plantation."

While those were taken down, Abdullah did decide to leave a select few snippets from the rant up, which you can see below:

It is clear that the seven-year veteran feels extremely passionate about health issues in his post-playing career. He's not alone, as many current and former players—plus fans and analysts—are starting to realize the immense dangers of the game and long-term impact it can have on the men that choose to play it.

In one of his tweets, the 30-year-old Abdullah seemed to imply that he suffered brain damage or some sort of head trauma whilst active in the league and noted that he has to pay weekly for treatment.

His brother—current Kansas City Chiefs safety Husain Abdullah—suffered at least four confirmed concussions during his career.

As per Strauss, the Abdullah brothers took a year off from football in 2012 in order to explore their Muslim faith.

The elder Abdullah was unable to secure a job in the NFL for the 2013 season.