Tyler J. Andrew Walker (born 17 October 1996) is an English professional footballer who plays as a forward for EFL League One club Lincoln City.

Walker made his professional debut for Nottingham Forest in the Championship as a substitute for Chris Burke in the 92nd minute of a 2–0 win over Rotherham United on 18 March 2015.

[5] Walker's first professional goal followed on 7 April in a 2–2 draw with Brentford at Griffin Park after he entered the game as a first-half substitute, on only his fourth first-team appearance.

[7] Owing much to a shortage of strikers and manager Dougie Freedman's willingness to give youth an opportunity, Walker played some games at the beginning of Forest's 2015–16 season.

In August 2016, new Forest manager Philippe Montanier stated that he could not assess Walker due to an injury that left him unable to play a part in pre-season.

[13] He made his debut in a 6–1 win over Hartlepool United at Broadhall Way on 2 September; he scored a brace in the match, the first of which was an overhead kick from close range – this performance earned him a place on the EFL team of the week.

[22] He scored the opening goal on his debut with a "superb 20 yards (18 m) strike" for 'The Valiants', before also going on to win a penalty in a 2–2 draw with Bury at Vale Park on 20 January.

[24][25] Ahead of the 2017–18 season, Forest manager Mark Warburton, who had been appointed as Montanier's permanent successor in March 2017, suggested that Walker would be involved with the first-team, claiming that he had "benefited from being in and around the first team squad here this summer" and that "other players need to go out on loan".

[26] On 23 August, Walker came off the bench to score the winning goal in extra time of a 3–2 victory over Newcastle United at St James' Park in the second round of the EFL Cup.

"[27] On 4 November, he scored the first brace of his senior career in a 4–0 home win over Queens Park Rangers, earning himself a mention in the EFL team of the week.

[31] He made his Wanderers début in their 1–0 victory over Bristol City, starting the match and lasting 58 minutes before being substituted; he was replaced by fellow Forest loanee Zach Clough.

[35] He scored a first-half hat-trick ten days later as Mansfield recorded a 6–1 home victory over Accrington Stanley in the first round of the EFL Cup; manager David Flitcroft said that Walker was "pure class".

[39] He was named as man of the match in the play-off semi-final first-leg against Newport County, but had his penalty saved in the shootout at the end of the second leg as Mansfield were eliminated.

[56][57] On 18 January 2022, Walker joined League One side Portsmouth on loan until the end of the 2021–22 season after being signed by former Lincoln manager Danny Cowley.