Born: 21 Nov 1994
Where: Hemel Hempstead
Joined Wycombe: July 2015 - Free from Watford.
Wycombe debut: Wycombe 3 York City 0 - 8 Aug 2015 - League Two
First goal: Wycombe 2 Northampton 3 - 3 Oct 2015 - League Two
Final game: Wycombe 1 Stevenage 0 - 5 May 2018 - League Two
Left Wycombe: 30 July 2018 - 'Undisclosed fee' to Sunderland
Career summary at Wycombe.
119 appearances - 16 goals
Career Details - (*) indicates loan spell
Date Club League
Jul13-Jun15 Watford 0(1) 0 0(0) 0
Mar14-May14 Wealdstone(*) 2(1) 0 0(0) 0
Aug14-May15 Wealdstone(*) - - - -
2015/2016 Wycombe Wanderers 33(2) 5 4(1) 0
2016/2017 Wycombe Wanderers 28(3) 3 7(1) 0
2017/2018 Wycombe Wanderers 34(1) 7 5(0) 1
Jul18- Sunderland - - - -
Midfielder given an 'initial one year deal' with the Wanderers on 24th July 2015 after the former Watford youngster impressed in two pre-season games and training. Speaking of the deal, Manager Gareth Ainsworth said:"Luke came to us highly recommended and he's proved himself to be a very talented player who will be an excellent addition to the squad. He's still young but his time on loan at Wealdstone gave him a great introduction to senior football and I'm looking forward to working with him to unlock more of his potential."

The 20 year old was released by Watford at the end of the 2014/15 season having played just two minutes of First Team football while at Vicarage Road and since joining as an Under 9. O'Nein scored for Wycombe against Wealdstone in a pre-season friendly four days before signing. -He had previously spent two loan spells at Wealdstone - the first at the tail end of the 2013/14 season as The Stones won the Isthmian Premier Championship and then again the following season, making 35 Conference South appearances and scoring fives times.

After a successful first season at Adams Park, had his contracted extended by three years. Commenting on the deal, Manager Gareth Ainsworth said: "From the first day Luke came in to train with us last summer, I knew I wanted to make him a Wycombe Wanderers player, and heís exceeded our expectations for a young man in his first proper season as a professional. Lukeís a real role model for youngsters wanting to make their way into the game with the way that he applies himself on the training ground, on the pitch on a matchday and also around the place with team-mates, staff and supporters." He added: "Weíre delighted to keep him here for another three years and Iím excited about the extent to which his career can develop during that time."

Meanwhile, OíNien said: ďThis place is home to me now and I never had any doubts about wanting to stay here. Iíve loved every minute from the first day that I came into training and everyone made me, my friends and family feel welcome. Iím enjoying my football and Iím learning every day from my team-mates and the coaching staff, and Iíd like to particularly thank the gaffer, Richard Dobson and Barry Richardson for the hard work they put in to help me improve my game."

He continued to be a crucial member of the Wanderers side for the following two seasons, culminating in being part of the team that gained automatic promotion to 'League One' at the end of the 2017/18 season - a season where he netted 7 times in the League. His performances were reported to have attracted the attention of several Football League teams and on Friday 27th July 2018 it was confirmed by the Club that they had 'reluctantly agreed a deal with Sunderland' for the sale of the midfielder for an 'undisclosed fee'. The two year deal was subsequently confirmed by Sunderland on Monday 30th July 2018.

Commenting on his move to Sunderland, Gareth Ainsworth said: "It fills me with immense pride. I am devastated at the same time but proud because for a club like Sunderland to come in for a player who was on trial with us three years ago just shows what a fantastic journey he has been on. But if anyone deserves it, it is Luke OíNien. He works his socks off. Heís always the last one in from training every day, he does his stretches, he does his work in the gym, he very rarely gets injured unless it is an impact injury and he is an example to all young players of how to make the best of who you are and what you are." The Wycombe Manager concluded: "I wish him all the best at Sunderland. I wish he was still at Wycombe but we will watch his career with great pride, as we do with Alfie Mawson, Jamal Blackman, Ebe Eze - players who have come in and gone on to do fantastic things."

OíNien took to social media on 31st July 2018 to send a message to Wanderers followers, saying: "I would like to thank every person connected to the Club that has made my time so special. You have all helped me to develop both as a player and a person. I canít express my gratitude enough. I so proud to have played for such a great Club, with so many great people, who supported me, every step of the way. You gave me my first opportunity in the football league and to finish with a promotion with such an incredible bunch of boys was beyond special and it will stay with me forever!" O'Nien added that receiving the messages of love and support [via social media] has been overwhelming and had filled him with great joy. He finished by saying: "I have so much respect for everyone affiliated with Wycombe Wanderers and will remain a fan of the club forever! I wish you all the best for the upcoming season and will see you all soon."

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