Yet another ex-Villa player! Wright took his time to agree to the switch after appearing to prefer a future at Rangers rather than Boro about 10 days ago.
The move for Wright has been forced upon McClaren, as both left side defenders will be missing at the start of the season. Franck Queudrue is suspended for five games and David Murphy is injured.
In defence of the signing Alan is an experienced defender who will strengthen the depth of cover we have at the back.