According to ESPN's Michael Kay, 38-year-old Andy Pettitte is hanging up the spikes.
"I have learned that Andy Pettitte will officially retire [Friday]," Kay reported via Twitter.
Sports Illustrated's Jon Heyman also said Pettitte will announce his retirement.
The report, if it turns out to be true, presents a major issue to the Yankees and general manager Brian Cashman with just weeks remaining until spring training opens. The New York rotation, as it is currently set, has CC Sabathia and Phil Hughes as the front-end starters. Beyond that, it'll be A.J. Burnett, Ivan Nova, Sergio Mitre, Bartolo Colon and Freddy Garcia to piece together the other 60 percent of starts.
That group combined to go 23-26 with a 4.72 ERA last year, with Colon didn't throw a pitch at any level.
Pettitte was pitching as well as ever last season before a groin injury derailed his season. He finished the year with an 11-3 record and 3.28 ERA. He made two playoff starts, getting two no-decisions and giving up four runs in 14 innings.
