Ashwin released a statement on social media explaining that he picked up a knee injury while training for the upcoming season in Chennai.
"While training in Chennai to prepare for the upcoming season, I hurt my knee. I've had a procedure, and the outcome means I will miss BBL|15. That is tough to say, I was genuinely excited to be part of this group and play in front of you."
With 537 Test, 156 ODI, and 72 T20I wickets for India, Ashwin added that he hopes to support Thunder from the sidelines.
"I will be watching every game and cheering for both our women's and men's teams. If rehab and travel line up and if the doctors are happy, I would love to be around later in the season and say hello in person. No promises. That is the intent."
Thunder general manager Trent Copeland expressed disappointment, saying: "Everyone at Sydney Thunder was devastated to learn of Ash’s knee injury that has ruled him out of BBL|15, and we wish him well in his recovery. From the moment we first spoke with Ash, his commitment to Thunder was clear. We are hopeful of welcoming him into our dugout for part of BBL|15, introducing him to our fans at events and building a long-term relationship."
