Torres was diagnosed Monday with a torn UCL in his left elbow after meeting with a physician and will require season-ending Tommy John surgery.

It's a major blow for the Yankees' top prospect, who was expected to provide the big club with a lift in the second half of the season, when he likely would have been called up from Triple-A Scranton/Wilkes-Barre. Instead, Torres' big-league debut will have to wait until 2018, as he'll now turn his attention to healing up before spring training arrives. With Torres out of the picture for the rest of the season, Chase Headley will gain some extra security in his role as the team's everyday third baseman. The 20-year-old was hitting .309/.406/.457 in 96 plate appearances since being promoted from Double-A Trenton to Scranton/Wilkes-Barre in late May.

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