Los Angeles Chargers offensive lineman Russell Okung revealed Thursday that he has been diagnosed with a pulmonary embolism.

Okung wrote in a statement posted on Twitter that he went to urgent care June 1 after experiencing "unusual chest pain" at practice. Doctors told him that decision, which he had viewed as precautionary, likely saved his life.

"I'm very grateful to my teammates, coaches and the entire Chargers organization for their care, support and understanding during this challenging situation," Okung wrote in the statement. "Thanks to an incredible medical team and a very supportive family, I hope to be back on the field as quickly as possible."

TRAINING CAMP:Old faces in new places, contract watches highlight top story lines

The pulmonary embolism, which is caused by blood clots in the artery of a lung, will not only keep Okung on the sidelines for the foreseeable future, It also could have been fatal.

According to the Mayo Clinic, about 1 in 3 people with an untreated pulmonary embolism do not survive.

Chris Bosh and Serena Williams are among the other notable athletes who have been diagnosed with a pulmonary embolism during their careers. Bosh dealt with blood clots at the tail end of his career, and Williams has twice been diagnosed with them — most recently in conjunction with the birth of her daughter, Olympia.

Okung, a 30-year-old tackle and two-time Pro Bowl honoree, will likely miss the entirety of training camp — and it's possible he could be out for the entirety of the 2019 season. Treatment for pulmonary embolisms typically include a prolonged use of blood-thinners, and contact sports are not recommended while taking them.

"Contact Tom Schad at tschad@usatoday.com or on Twitter @Tom_Schad.

If you love talking football, we have the perfect spot for you. Join our Facebook Group, The Ruling Off the Field, to engage in friendly debate and conversation with fellow football fans and our NFL insiders.