It's been a rough offseason for Cowboys defensive lineman David Irving.

Adding onto it, Irving took to Instagram on Friday to open up more on his issues with substance abuse and even claimed he's been medicated in every game he's been in.

Warning: There is offensive and NSFW language in these screenshots. We have censored some of the offensive language and edited some comments for clarity.

It all started with this innocent post to Irving's Instagram on Friday, captioned "God, grant me the serenity to accept the things I cannot change ... The courage to change the things I can ... And the wisdom to know the difference."

Then some fans retorted at Irving, knocking him for his substance abuse. Irving responded, clarifying he was suspended for marijuana use.

Screenshot from Cowboys defensive lineman David Irving's Instagram

Irving followed with a long rant about why he doesn't think using marijuana is wrong and blamed the NFL's policy, saying "The NFL laws on weed are [Expletive] and we all know it."

Screenshot from Cowboys defensive lineman David Irving's Instagram (Photo credit: www.bloggingtheboys.com)

Irving followed by saying that even though he doesn't think using marijuana is wrong, he will comply by league rules, saying "No matter how [Expletive] up the rules are, I have to follow them."

Irving also said he will also follow the rules because "I'm a survivor and I have to do this for myself and the ones I love.

Screenshot from Cowboys defensive lineman David Irving's Instagram (Photo credit: www.bloggingtheboys.com)

This is just the latest incident in a troubled offseason for Irving.

He missed organized team activities during the offseason because he was trying to take sole custody of his daughter, Zoe. He attended mandatory minicamp in June to avoid a hefty fine, but could only do conditioning work on the side. Irving also missed training camp by design, according to Jerry Jones, to address "ongoing issues."

Before that, Irving was involved in a falling out with Angela Sanchez in April that included domestic violence allegations to Frisco police, which his ex-girlfriend eventually recanted.

Vice president Stephen Jones said in January the Cowboys wouldn't pursue a long-term deal for the restricted free agent.

Irving was also suspended for the first four games of the season for the second straight year, this time for violating the NFL's substance abuse policy.

Irving will be eligible to return to the Cowboys active roster Oct. 1 following their Sept. 30 game against the Detroit Lions. He'll lose $685,000 while missing games against the Panthers, Giants, Seahawks and Lions.