The 26-year-old will probably be most fondly remembered for his late equaliser against Manchester City in the Premeir League.
"It's going to be an exciting season", Baker told the club website.More news: Hope Doklam is resolved peacefully, says Bhutan
After making 36 appearances for Middlesbrough, the once-capped Netherlands worldwide leaves for an undisclosed fee to join Serie A outfit Atalanta, who will be competing in the Europa League next season after finishing fourth in the Italian top division. "We'll see where that will get to within the coming days". Nothing is 100% at this moment in time.
After successful loan spells with Sheffield Wednesday, MK Dons and "Chelsea B" Vitesse Arnhem, the Northern Echo believe that Baker has now been given permission to leave Stamford Bridge on loan, and Middlesbrough looks to be his next destination. However, new arrival Tiemoue Bakayoko's knee injury coupled with the sales of Nemanja Matic and Nathaniel Chalobah have left Chelsea looking somewhat thin in terms of central midfield options as they reportedly pursue deals for Danny Drinkwater and Ross Barkley.