Career
He is a left back who also played in the Premier League and the Football League for Birmingham City, and in the Football League for Northampton Town, Watford, Stockport County, Shrewsbury Town, Walsall and Crawley Town. Birmingham City Born in Solihull, Sadler began his career as a junior with Birmingham City. On 21 November 2003, having not played for Birmingham that season, Sadler went on a two-month loan to Northampton Town, playing eight games, seven of which in the Third Division.
In May 2004, signed a new contract to keep him at Birmingham.
This was his only appearance until 1 April when he was in the first team to play Chelsea at home, a goalless draw. He stayed in the starting line-up for the remaining games, as the season ended with relegation.
Watford Sadler joined Watford on 24 January 2008 for an initial fee of £750,000, rising to £900,000 depending on appearances. He signed a three-and-a-half-year contract.
Sadler eventually fell from grace at Vicarage Road and made his final appearance for Watford in December 2008 in a 2–4 home defeat to Bristol City.
He joined Stockport County on loan in January 2010 and remained at Edgeley Park until the end of the League One season. His debut for the club took place on 30 January against Southampton. Sadler joined League Two club Shrewsbury Town on 7 July 2010 on loan for six months.
Later career Sadler joined Walsall on 27 June 2011 after being released by Watford.
On 8 June 2012, Sadler joined newly promoted League One side Crawley Town on a free transfer. Sadler joined Rotherham United on a free transfer from Crawley Town on 17 June 2014.
He played only once, in the League Cup, before returning to Crawley in September on loan for two months. When his loan expired, he returned to Rotherham, and made no further first-team appearances until joining Oldham Athletic on a month"s loan in March 2015.
Return to Shrewsbury Following his release from Rotherham, Sadler signed for former loan club Shrewsbury Town in League One, on a two-year contract in May 2015.
A regular in the side in the early part of the season, Sadler scored his first goal for the club in a 2−1 defeat to Chesterfield, but lost his place in the first-team after a run of poor personal form. Having been recalled for an first round victory at non-league Gainsborough Trinity, he was praised for his "first class attitude" and determination by manager Micky Mellon. Sadler played nine times for England under-17, including at the 2002 European Under-17 championships, appeared once for the under-18s, and played four times at under-19 level
