If the New York Yankees are unable to land Japanese ace Masahiro Tanaka, they may choose to fill the remaining two rotation spots internally, reports Jorge Castillo of the Newark Star-Ledger.

Tanaka, 25, has been a top Yankees target since rumors first popped up that the Rakuten Golden Eagles could post him. However, the expiration of the previous posting system delayed his possible MLB signing, and the advent of the new system may cause Rakuten to keep Tanaka rather than posting him. Even if Tanaka is posted, the Yankees can no longer win exclusive negotiating rights by posting the highest bid. Instead, all 30 MLB teams can talk to Tanaka, including the Cubs, Rangers, Red Sox and Dodgers, all of whom have shown immense interest in the 25-year-old star.

Thus, New York might not be able to bring Tanaka aboard for the 2014 season, leaving them with a rotation of 39-year-old Hiroki Kuroda, recently struggling CC Sabathia, Ivan Nova, and two question marks. The team has a number of options to fill the back of the rotation, but the quality of those options can be called into question.

Yankee's general manager Brian Cashman said that he would "have to be" comfortable with utilizing two pitchers on the current roster to fill out the starting staff.

"We’re focusing solely on what’s available in the marketplace," Cashman told the Star-Ledger. "And also recognizing and restating that we might not get everything answered with an exclamation point or the comfort level that we’d prefer."

Top options on the roster to fill a starting role include Michael Pineda, David Phelps, Manny Banuelos, David Huff, Adam Warren and Vidal Nuno.