Sheffield Wednesday defender Leigh Bromby joined the Canaries on a month's loan on February 24th 2003. Not manager Chris Turner's first choice in defence, he has been allowed to join the Canaries on loan to gain some competitive matches "under his belt".

Bromby made his debut for Wednesday in the 2000/01 season after progressing from their youth team. He had made 78 appearances and 1 goal for the Sheffield club prior to his move to Norwich. He also spent a loan spell with Mansfield in 1999/2000 where he scored once in ten appearances.

On March 22nd 2003, Norwich manager Nigel Worthington stated that he was keen to bring Bromby to Carrow Road on a permanent basis, even if that started with an extension to the current loan agreement. Worthington stated that Bromby "has done ever so well". Wednesday were offered four of Norwich's squad to take on loan in place of Bromby to ensure that an extension to the loan deal could take place. This included striker David Nielsen. No deal could be arranged with Wednesday and Leigh returned to Hillsborough on 27th March 2003.

With Wednesday relegated, it appears likely that Leigh would move on and the media has already linked him with a move back to East Anglia with Ipswich especially as Ipswich Assistant Manager Willie Donachie knows him from their time together at Hillsborough. Joe Royle though stated that "there is nothing in this". Norwich were then linked with him at the beginning of the 2003/04 season with Leigh rumoured to have travelled to Norwich for talks according to his manager Chris Turner. Norwich then announced that they would not be pursuing their interest as the two clubs could not agree terms.

Leigh was eleased by Sheffield Wednesday at the end of the 2003/4 season. He was linked the following month with a switch to Huddersfield. Intead, he switched to Sheffield United, becoming one of many signings made by Neil Warnock towards the end of June 2004. Warnock also added Alan Quinn, Andy Liddell, Jon Harley and former Fulham striker Barry Hayles to the Blades squad. "Leigh Bromby is a player I have always liked from afar. The change of club will do him good and give them the gee-up they need to change."

On 31st January 2008, Watford signed Bromby from Sheffield United for an initial fee of £600,000, which could rise to £850,000. The 27-year-old, who joined the Blades in 2004, has signed a three-and-a-half year deal with the Hornets. The former Sheffield Wednesday, Norwich and Mansfield player had spent much of the season on the fringes of the squad but he forced his way back into the team and ironically made his last Blades appearance against his new club. He can be seen as a replacement for Calum Davenport who broke a bone in his neck on his debut for the Hornets.

Leigh returned to Sheffield United in January 2009 on a six month loan with a view to a permanent deal. This move was completed in the summer of 2009. At the end of August 2009, reports from Yorkshire suggested that Leeds had been given permission to speak to Bromby about a switch to Elland Road. This switch became real on 1st September 2009 with Leeds paying £250,000 for him.

Leigh injured his patella tendon in the final away game of 2011/12 at Cardiff City. Missing the 2012/13 season, he was placed in charge of Leeds' Under-18 side at the beginning of April 2013 as Under-18 coach Richard Naylor was promoted to assist caretaker manager Neil Redfearn following Neil Warnock's departure. He retired from playing in the spring/summer of 2013.

On 11th July 2014, Bromby and Under 18's manager Richard Naylor were made redundant by Leeds owner Massimo Cellino. On 4th August 2014, Bromby joined Huddersfield Town as Professional Development Coach.

In 2020 his role changed to that of Head of Football Operations.

On 13th June 2023 Bromby and goalkeeping coach Paul Clements left Huddersfield. It followed Jake Edwards' appointment as Huddersfield chief executive on 12th June. Edwards thanked both coaches in statements and called the change in personnel "a fresh start", with Kevin Nagle's takeover from existing owner Dean Hoyle close to fruition.