Girardi confirmed after the game that Warren will start and make his Major League debut on Friday in place of Sabathia. Freddy Garcia, who pitched today, will replace Pettitte and start on Monday.
Warren, who had a 6.10 ERA after a rough April, has a 3.86 ERA with a 6.2 K/9 and a 2.8 BB/9 over 86.1 innings this season. Garcia has a 1.56 ERA in 10 appearances since May 1 with a 6.23 K/9 and 1.56 BB/9 over 17.1 innings. Igarashi has a 22.50 ERA in three outings with a 18 K/9 and 18 BB/9 in two innings. He has a career 6.21 ERA, 9 K/9, and 6.34 BB/9.
To make room for Warren on the 40-man roster, the Yankees are expected to place Pettitte on the 60-day DL, according to Marc Carig of the Star-Ledger.
My expectation is that David Phelps will replace Igarashi before too long and serve as the long-man or spot starter should Warren or Garcia struggle. He has made two starts since being demoted and only pitched 5.1 innings while he is being stretched back out.