|Date of birth||16 August 1983|
|Place of birth||Bulgaria|
|Height||1.82 m (5 ft 11 1⁄2 in)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 21 August 2016|
Valeriev is a left-footed player and does not have any problems playing as a left-sided midfielder. He has good creative skills. In the winter of 2011 he went on trial with Kazakhstani club Caspiy, but eventually refused to sign because the club changed the salary figures.