Frederick missed the 2018 season after he developed Guillain-Barre Syndrome, a condition that causes muscle weakness.
Frederick returned for the 2019 season and earned his final Pro Bowl nod - but has now chose to call a halt to his impressive career.More news: Stocks surge on building hopes for U.S. virus stimulus
"After much consideration, discussion, and reflection, I have made a decision to retire from football", Frederick wrote in a Twitter post on Monday.
During training camp in California two years ago, Frederick saw a specialist there because of feelings he said were similar to stingers in his neck and shoulders.
In his goodbye, he spoke to his battle with Guillain-Barre Syndrome, and the hard journey back to the field of play as well as the struggle it was to play once he came back. "I was scared. That experience forced me to re-evaluate my life priorities". "I made my return to the field, played well overall, and was selected to the Pro Bowl".More news: Joel Embiid to help coronavirus relief efforts
Frederick attributed his battle with the disease as a significant reason for why he's retiring at 29 years old, saying he "could no longer perform at my highest level" and admitting he knows his "days as a football player are done". "Playing "well" is not what I expect of myself and not what my teammates deserve". "His leadership ability production and intelligence put him at the top level of interior offensive linemen in our league for many years".
The final answer was something different, and leaves a big void in the middle of the offensive line.
"After months of contemplation, I found myself not only accepting that moment but welcoming that moment". "I was ready for the next stage of my life".More news: Taylor Swift Responds To Full Kanye West Phone Call Leak