We’ve identified 13 players who are out of contract ahead of the 2019/20 season and could be targeted by the Teessiders.
1. Kadeem Harris
Boro are desperate to add more pace and width to their squad and have been linked with the 26-year-old winger. Harris scored one goal in 13 Premier League appearances for Cardiff last season. Photo: Stu Forster
2. Jonny Williams
A Welsh international, Williams helped Charlton win promotion from League One last season. The midfielder, 25, has said he wants to stay at the Valley but is yet to sign a new deal. Photo: Catherine Ivill
3. Albert Adomah
A player Boro fans know well. Adomah, 31, helped the Teessiders win promotion from the Championship in 2016 and was also part of the Aston Villa side which reached the top-flight last term. However, he wasn't offered a new deal. Photo: George Wood
4. Jake Bidwell
A shortage of full-backs meant Boro had to play players out of position last season. Bidwell, 26, is established at Championship level after making 40 league appearances for QPR last term. Photo: Catherine Ivill