Detroit Tigers LHP Daniel Norris will undergo surgery to remove a cancerous tumor this offseason, he announced in an Instagram post today.

Norris was diagnosed with thyroid cancer during the season, before he was traded by the Toronto Blue Jays as part of a three-player package for LHP David Price. The Detroit Free Press reported Tigers general manager Al Avila was aware of the cancer when the trade was made, and Norris is expected to make a full recovery by spring training.

Norris pitched for the Lansing Lugnuts in 2013, going 1-7 with a 4.20 ERA, 99 strikeouts and 44 walks in 85.2 innings (23 games/22 starts). He made his MLB debut in September 2014. He made 13 major-league starts this year (five for the Blue Jays and eight for the Tigers), going 3-2 with a 3.75 ERA, 45 strikeouts and 19 walks in 60 innings.

Here is the full text of the announcement made by Norris:

I’ve been debating for months as to how or even if I should share this with people. – I’m a firm believer in the power of prayer. So now, I’m asking for prayers. – A few months ago, after I was optioned to AAA, I found out I had a growth on my thyroid. Flying back & forth from Toronto to Buffalo after pitching to have more and more tests done it was finally concluded that the growth is considered malignant.. Meaning it contained the C word.. cancer. Hearing this was alarming, yea. 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. Regardless of results on the field, I forgot about it when I was between the lines. Afterall, I was just trying to get the heck out of AAA. & I did. I was revived with an opportunity, a blessing from God, with the Tigers back in the Big Leagues. So yea, the power of prayer.. It got me through this season. Now that it’s over it’s time to get this thing out, so please keep me in your thoughts & prayers as I undergo surgery & come out 100% cancer free! As always,,, #justkeeplivin