Date of birth
Defender. A 2016 summer transfer deadline day signing from Huddersfield Town, left-back Senior won the Professional Development League 2 Championship in the 2015/16 season with his former side.
The 21-year-old left the Terriers after a nine-year association with the club, signing for the Hatters on a two-year-deal.
He made his first professional appearance for the Hatters against West Bromwich Albion in the Checkatrade Trophy in October 2016.
Senior's EFL debut came on 14th January, the day after his 20th birthday, when he appeared as a second-half substitute in the 2-1 win at Crewe – going onto make 16 appearances in his first season at the club.
The Yorkshireman was also named in the Checkatrade Trophy team of the 2016-17 season.
He extended his stay with the Hatters until 2019 with the option for another year in November 2017, making a further five appearances in his second season at the club.