|Date of birth||5 January 1983|
|Place of birth||Chesterfield, England|
|Height||6 ft 02 in (1.88 m)|
|Woolley Moor United|
|2001–2002||→ Worksop Town (loan)||20||(10)|
|2004||→ Gainsborough Trinity (loan)||5||(1)|
|2011–||Woolley Moor United||27||(36)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 12 December 2007.
He notably played in the Football League for Lincoln City and Boston United after starting his career with Sheffield Wednesday. He has also played for Worksop Town, Gainsborough Trinity and Matlock Town.
Cropper was a produce of the youth setup at Sheffield Wednesday and signed professional terms with The Owls in August 2000, a few months prior to the club's relegation from the Premier League. He would only make the reserve team that season, and although he was offered a new deal he left the club on free transfer in the summer of 2002.
During the 2001–02 season Cropper signed on loan for Worksop Town, He notched up a decent scoring rate for them, netting ten goals in twenty games.
On 10 May 2002, Cropper along with Ben Futcher became Lincoln City manager Keith Alexander's first signings of his second spell in charge at Sincil Bank. He made his Football league debut in the club's 1–1 opening day draw at Kidderminster Harriers on 10 August 2002, though this was marred when, seven minutes from time, referee Phil Crossley deemed his challenge on Abdou Sall unfair and, following an earlier booking for dissent, dismissed him for two bookings. His home debut, three days later, was a far happier affair as he notched his first goal for the club in a 2–0 victory over Rochdale. Cropper had a good season with Lincoln, but failed to score as many goals as his play deserved in a season which saw him and his team lose out in the playoff finals at the Millennium Stadium.
The following season, Cropper found himself overlooked, and was finding himself on the bench on a regular basis due to long lay offs with injury and the performances of the club's other forwards. In February 2004 he signed on loan with Non-League club Gainsborough Trinity, in a month that saw him net once in five appearances at The Northolme. He returned to Lincoln after his month and was subject to another loan offer, this time from Scarborough, but he rejected the chance to play for Scarborough in favour of a permanent switch to local rivals Boston United. Cropper played five times for Boston and scored once but suffered a serious knee injury towards the end of the season which prompted his release from the club.
He joined Woolley Moor United F.C. ahead of the 2011–2012 season, debuting in the club's 4–2 Midlands Regional Alliance, Division 1 victory at Findern on 13 August 2011. Outside of football, Cropper was a science teacher at ARK Kings Academy. However, he has now moved to Fairfax School full-time as a Science Teacher.
- "City in Double Signing Swoop". Lincoln City F.C. Official Website. 10 May 2002. Archived from the original on 7 March 2012. Retrieved 13 October 2011.
- "Harriers 1 Red Imps 1 – Keith Speaks.." Lincoln City F.C. Official Website. 10 August 2002. Retrieved 13 October 2011.[permanent dead link]
- "Lincoln City 2 Rochdale 0 – Keith Speaks.." Lincoln City F.C. Official Website. 13 August 2002. Retrieved 13 October 2011.[permanent dead link]
- "Away day win gets Woolley up and running!". Woolley Moor United F.C. Official Website. 13 August 2011. Retrieved 13 October 2011.
- "ARK Kings Academy: Teaching Staff". ARK Kings Academy Official Website. Retrieved 6 December 2012.