Pettitte and Rivera will become the 13th and 14th former Yankees to receive the Opening Day honor; Posada threw out the ceremonial first pitch prior to the 2012 home opener.
Gates will open at 11 a.m.; festivities are slated to begin at approximately 12:30 p.m. with the introduction of both teams. The Yankees are asking fans to budget ample time when planning their trip to the Stadium and urging the use of public transportation.
Kelli O'Hara, a Tony nominee and the co-star of the Broadway musical "The Bridges of Madison County," will sing the national anthem. In addition, a large American flag will be unfurled by 75 West Point cadets.
During the seventh-inning stretch, James Moye of the Broadway hit "Bullets Over Broadway" will perform "God Bless America."