Huddersfield Town head of football Leigh Bromby admits the Terriers have sold "one of the best" players in the Championship to Nottingham Forest.
O'Brien has become the club's 10th summer arrival as Forest prepare for their return to the Premier League after a 23-year exile from the top-flight. Harry Toffolo, also formerly of Huddersfield, joined the Reds today and both players will aim to impress Steve Cooper during pre-season.
Midfielder O'Brien joined Huddersfield as an 11-year-old and made a total of 130 appearances for the club in all competitions, scoring eight goals. Speaking of the 23-year-old's exit, head of football Leigh Bromby said: "We’ve known Lewis a very long time and we’re all proud of the player, and man, he has become. He’s clearly established himself as one of the best players in the Sky Bet Championship and has earned the opportunity to play in the Premier League.
