Jacoby Ellsbury looks on during his introductory press conference at...

Jacoby Ellsbury looks on during his introductory press conference at Yankee Stadium. (Dec. 13, 2013) Credit: Getty Images

The tradition of former Red Sox players crossing enemy lines to come to the Bronx continues Friday.

The Yankees will introduce their newest outfielder, Jacoby Ellsbury, during a press conference at 11 a.m.

Ellsbury joins other big-ticket signings by the Yankees this offseason, including Brian McCann and Carlos Beltran.

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