Signed on deadline day after the summer transfer window of 2015, the Welshman is a defender with plenty of potential.
While with Newport County, after being released by Cardiff City, he caught the eye of bigger clubs and had trials with both United and Liverpool. Newport boss Terry Butcher refused to stand in his way when the Reds came calling and an undisclosed fee was agreed between the clubs. Poole is County's youngest-ever player after making his debut aged 16 and 94 days and has represented Wales' Under-17 side. Although he trained with the first-team squad ahead of Champions League games, he had a long wait for clearance to be received in order to pull on the red shirt. His big moment came on 1 February when he was named on the bench for the Under-21s' clash at Everton and he came on for the last few seconds to make his debut for United. A first start followed against Manchester City and he was outstanding in a holding midfield role, making a number of excellent blocks and challenges. An incredible experience as a late substitute against Midtjylland in the Europa League provided a real highlight for Poole and made up for his lengthy spell on the sidelines. He finished the season strongly, scoring twice in the Manchester Senior Cup semi-final against Bury. It was not his first goal for the Reds as he also hit the target in the quarter-final victory over Oldham Athletic. Although nominally a centre-back, he has shown another string to his bow in midfield and has looked the part since getting his opportunity to play. A strong character, he captained the Reds at the Dallas Cup but picked up a red card in the final group game against Coritiba. Although that dismissal was harsh, it was not his first sending off of the campaign and he will have learned lessons on a disciplinary level after missing a number of games due to suspension. He was still a regular, when available, and racked up 22 appearances in the Reserves - proving more than capable at that level. It led to a loan move to Northampton Town, which will have taught him much as the Cobblers endured a difficult campaign that ended in relegation. Poole returned to United in the summer of 2018 and was instilled as captain of the Under-23 side. He played every single league game for Ricky Sbragia’s men up until mid-January, when his impressive showings earned him another loan move to Newport. He joined the Welsh club on 18 January 2019 and instantly went into the starting XI for their game against Exeter City the following day. Within a few weeks of his return to Rodney Parade he was part of the side that beat Championship side Middlesbrough in the fourth round of the FA Cup, setting up a tie with Manchester City.