It appears as if the Yankees' worst fears have been confirmed, in that right-hander Ivan Nova seems very unlikely to undergo season-ending Tommy John surgery, putting him out until around the middle of next season.

Here is the official release from the Yankees just moments ago:

"Under the supervision of Yankees Team Physician Dr. Christopher Ahmad, RHP Ivan Nova underwent an MRI arthrogram today at New York Presbyterian Hospital in Manhattan. Results of the exam confirmed the original diagnosis of a partial tear of the right ulnar collateral ligament. Surgery has been recommended."

If my facts are correct, Nova will likely become the 15th Major League pitcher to have the Tommy John surgery this season, with that number continuing to grow as the weeks go by.

Vidal Nuno was listed with the startign pitchers on the lineup card for today's game, so it appears that he'll be taking over for Nova in the rotation for the time being. Nuno tossed five shutout innings in the Yankees' win over the Rays on Sunday, so it wouldn't be surprising if they give him another shot.

However, David Phelps does seems likely another candidate who could take over the role as well. He has more experience as a big league starter than Nuno does, so maybe that go that direction, if they decide not to choose Nuno.

We'll know more on the situation when manager Joe Girardi speaks to the media soon.

Twitter: @GavinEwbank