Boro's No.2 keeper Mark Crossley has joined first division Stoke City, while 20-year-old Phil Gulliver has joined second division Blackpool, after impressing during a trial period.
Crossley has not started a game in the Premiership this term and has been in good form for the reserves. His place on the bench tomorrow at West Brom will probably be taken by Brad Jones.
Mark Hudson who has recently returned fron a long spell a Chesterfield has also gone back out on loan, this time to Carlisle of the third division.
They follow the recent loans of Dean Windass and Jason Gavin to Sheffield United and Grimsby Town respectively.