I assume you mean Dae-Eun Rhee.
He's actually at High A Daytona and his recovery from Tommy John surgery hasn't gone that well. He had the surgery in 2008, was expected to do something last year and pitched pretty badly. At this point you'd be hard pressed to rank him in the Top 30 prospects for the Cubs. He's just kind of a guy now. There's still some hope for him but ever since he had surgery he's been bad.