New York Yankees infielder Brendan Ryan will begin a rehab assignment Friday with the minor-league Trenton Thunder as he recovers from a back injury.

Yankee shortstop Brendan Ryan (Patrick Smith/Getty Images)

Ryan will be in the lineup as the Thunder, the Yankees Class AA affiliate in the Eastern League, play the Richmond Flying Squirrels.

Ryan, a seven year major league veteran, has been sidelined all season with a lower back injury that he sustained in spring training.

He has a career .237 average with 106 doubles and 19 HR in 783 games with St. Louis, Seattle and New York.

Ryan played in 17 games with New York last season.

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