For months, speculation had been rampant that Corbin, the top free-agent pitcher on the market this winter who grew up in upstate Clay, N.Y. was destined to be a Yankee. They wanted him, and he and his friends and family made no secret of the fact they wanted a homecoming of sorts. There was only one problem. Just because the 29-year-old lefthander, coming off a career-best season in which he was the second-hardest pitcher in baseball to make contact off, was regarded as the No. 1 starter in this year’s free agent class, didn’t mean he was literally a No. 1 starter.