Boesch was released by the Tigers earlier this week after Detroit was unable to trade him, having settled on Andy Dirks as their starting left fielder. He is now expected to compete for a corner-outfield job with the Yankees while Curtis Granderson recovers from a right forearm fracture that should keep him out of New York's lineup until early May.
Boesch hit .240 with 12 home runs and 54 RBIs in 132 games last season, posting a .659 OPS. Boesch is a career .259 hitter over three big league seasons and had his best year in 2011, when he batted .283 with 16 homers, 54 RBIs and a .799 OPS in 115 games.
Yankees general manager Brian Cashman has been scouring available options following a rash of spring injuries that also included the loss of first baseman Mark Teixeira, who strained his right forearm and is expected to be out of action until the middle of May.
The signing of Boesch would restore the Yankees to an all left-handed-hitting outfield alignment, with Brett Gardner and Ichiro Suzuki expected to be in New York's outfield on Opening Day. Boesch has played 251 career big league games in right field and 101 games in left field.
The Yankees have been auditioning for a right-handed outfield bat this spring to help balance their order and provide an option against left-handed pitching; Juan Rivera and the recently acquired Ben Francisco, who signed a Minor League deal this week, are thought to be the leading candidates for that job.
New York has also been giving spring playing time to veteran Matt Diaz, as well as prospects Zoilo Almonte, Melky Mesa and Ronnier Mustelier as they examine their in-house options for outfield help.
Bryan Hoch is a reporter for MLB.com. Follow him on Twitter @bryanhoch and read his MLBlog, Bombers Beat. This story was not subject to the approval of Major League Baseball or its clubs.