Nugent has signed a three-year contract with Boro and will be available for Saturday’s Championship game against Bolton.
“I am delighted that David has agreed to join us because everyone knows what a good player he is,” Boro boss Aitor Karanka told the club website.
“We have worked really hard to bring David to the club and everyone can see that we have not had to spend a crazy amount of money to bring him here. It’s important to get the right players at the right price.
“The good thing is that David wants to join us and believes in our project and this club. I believe we are signing a very good player.”
— Middlesbrough FC (@Boro) August 14, 2015