If you're recruited and you got all of your application in really early, its possible. Many more likely letters go out in the RD round. According to the Ivy Joint Statement on Admissions, "Likely Letters to Student-Athletes From October 1 through March 15 of senior year, an admissions office may issue probabilistic communications, in writing, to recruited student-athlete applicants who have submitted all required application materials."

I assume you mean an ED application. My DS received a likely letter in February for an April 1 decision. He has now graduated.

I'm not sure anyone would want to share that here, but yes, I know of several that went out. Hockey and LAX

if so what sport/school?