Sunderland take on Birmingham City in the Championship this afternoon, and one Blues player may be at the front of Michael Beale’s thoughts. Sunderland head to Birmingham City where the Black Cats go up against former boss Tony Mowbray. The 60-year-old was out of work for just a few weeks after leaving the Stadium of Light in December, then replacing Wayne Rooney in the January. Since, Mowbray has overseen five Championship games, winning two, drawing one, and losing two, with his side currently six points above the drop zone after a midweek win vs Blackburn Rovers. January saw Blues sign some…