Daniel Norris revealed Monday that he has been diagnosed with cancer and will undergo surgery this offseason.

The 22-year-old left-hander was acquired by the Detroit Tigers in a trade with the Toronto Blue Jays at the deadline this past season.

Norris was diagnosed with a malignant tumor on his thyroid a couple of months after being optioned to Triple-A Buffalo in April and that he learned of this diagnosis while shuttling between Buffalo and Toronto for additional testing.

Tigers general manager Al Avila confirmed that the team was aware of the diagnosis prior to making the trade for Norris with the Blue Jays.

"Hearing this was alarming, yea," Norris said in an Instagram post. "Weird, yea, that too. I was given the option to shut my year down & get it removed immediately. However, seeing another doctor that determined I could wait until the end of the season reassured my gut feeling. Just Keep Playing. Baseball kept me sane."