Bernie Williams

The Yankees will "likely" retire the numbers of Bernie Williams and Jorge Posada, according to a report. (File photo)

The Yankees will retire the numbers of Bernie Williams, Jorge Posada and Andy Pettitte in 2015, the team announced Monday.

Each will also get plaques in Monument Park at Yankee Stadium. Willie Randolph will also be honored with a plaque.

That means no Yankees player will wear Williams' No. 51, Pettitte's No. 46 or Posada's No. 20 again. They join 18 current Yankees to have their numbers retired, a list that includes Babe Ruth, Mickey Mantle and Joe Torree, who had his No. 6 retired last year.

A five-time All-Star and four-time World Series champion center fielder, Williams will have his number retired May 24.

Posada, a catcher, and Pettitte, a lefty pitcher, each were members of the Core Four -- a group that won World Series titles with the Yankees in 1996, 1998, 1999, 2000 and 2009 and also includes Mariano Rivera, whose No. 42 has already been retired by the team, and Derek Jeter. Jeter's No. 2 is also a sure bet to be retired, perhaps in 2017.

Posada will be recognized Aug. 22 and Pettitte will be honored Aug. 23.

Randolph, who played 13 seasons with the Yankees, will get his plaque during Old Timers' Day festivities June 20. He also spent 11 seasons coaching within the organization.

Pettitte's son, Josh Pettitte, broke the news that his father would be honored Sunday night on Twitter.

The retiring of Andy Pettitte's number could stir some controversy. Pettitte has admitted using human-growth hormone, a substance banned by the league. And the Yankees this spring will see the return of Alex Rodriguez, who in the past has used steroids, also a banned substance. The Yankees reportedly plan to battle Rodriguez over performance bonuses in his contract that the club believes should be voided, considering Rodriguez's prior substance use.