However, he said last week was the first time he experienced any issues.
Sources told ESPN on Sunday that Montgomery had blood in his urine and the Packers kept him out for precautionary reasons.
Montgomery said he and his doctors believe this was related to sickle cell trait, not a hit he sustained during a game, and don't think it's career-threatening. In fact, Montgomery hasn't ruled out playing Sunday against the Colts at Lambeau Field. John Brown and Tevin Coleman have recently been diagnosed as well. Montgomery said in the article he's not concerned about it.