Foster retires with lengthy Instagram post

Ramon Foster is hanging up the cleats after an 11-year career, all with the Steelers.

Monday, Foster posted the following statement to his Instagram, along with a photo of a letter which simply states, "I hereby notify the Steelers that I am retiring." with his signature:

The text accompanying Foster's post is heartfelt, detailing his journey from the University of Tennessee to his long career with the Steelers, all starting as an undrafted free agent in 2009.

"When the time comes, you just know and now is a time for me to take a bow," Foster writes. "I’ve had a long, fun and life changing career. Who would have ever thought an undrafted kid out of the University of Tennessee would make it in…