He signed for the club permanently in May 2013, and during his two-year spell there scored eight times in 69 matches, whilst also being loaned to Dagenham & Redbridge.

Born in England, Agyemang qualified to play for the Ghana national team through his ancestry, earning two caps and scoring one goal.

Agyemang left school at the age of 16 and was offered academy scholarships by Wimbledon and Charlton Athletic.

[2] He made his Brentford debut in a 2–1 home defeat to Gillingham on 19 October 1999, coming on as a 56th-minute substitute in the match.

[3][10] Due to Wimbledon's financial problems,[11] Agyemang was sold to fellow Division One club Gillingham on 2 January 2004 for a fee of £150,000.

[10] He scored a further five goals during the latter stages of the 2003–04 season, which included the first brace of his career against Walsall on 12 April 2004,[10] as well as the winner against his former employers, Wimbledon.

[10] After scoring twice for Gillingham in 14 appearances in the opening months of the 2004–05 season,[14] Agyemang attracted transfer interest from fellow Championship club Preston North End.

[14][18] This included three second-half substitute appearances in the Championship play-offs that season, with Preston losing out on a place in the Premier League following a 1–0 defeat to West Ham in the final.

[36] Agyemang subsequently signed for Championship club Bristol City on 25 January 2010, on a loan agreement until the end of the 2009–10 season .

[44] There was competition for forward places following the acquisition of DJ Campbell and Jay Bothroyd ahead of QPR's return to the top tier of English football,[45][46] Agyemang started in the club's first away game of the season, a 1–0 triumph against Everton at Goodison Park on 20 August 2011.

[5][51] Agyemang made his Millwall debut two days after signing, playing the first 45 minutes in a 1–1 away draw against Middlesbrough on 15 October 2011.

[55] After four months without first-team football, Agyemang joined League One club Stevenage on 8 March 2012, on a loan agreement until the end of the 2011–12 season.

[67][68] Having made 16 appearances for Stevenage during the first half of the season, without finding the scoresheet, Agyemang joined Portsmouth of League One on a one-month loan deal on 8 February 2013.

[69] He made his first appearance for Portsmouth in a 2–0 defeat to AFC Bournemouth on 9 February 2013, playing the opening 65 minutes of the match.

[77] Shortly after the end of the season, Agyemang agreed a two-year permanent transfer to Portsmouth, joining the club on 1 July 2013, after his Stevenage contract expired.

[80] Agyemang did not play as much following the departure of manager Guy Whittingham,[11] making 10 appearances for Portsmouth during the first half of the following season.

[84][85] Agyemang also made one appearance for Cray Valley Paper Mills of the Southern Counties East League, starting in a 5–3 away victory against Lordswood on 18 August 2018.

[91] Despite offering an alternative to other attacking options due to his height and physical presence,[92] Agyemang did not make Ghana's 23-man squad.

[12] He stated he was wrongly labelled as a target man by managers in the latter stages of his career and felt the role was not playing to his strengths[11] — "I hated heading the ball.