|Full name||Marco Júlio Castanheira Afonso Alves Ferreira|
|Date of birth||12 March 1978|
|Place of birth||Vimioso, Portugal|
|Height||1.77 m (5 ft 9 1⁄2 in)|
|1997||Atlético Madrid B||4||(0)|
|2004–2005||→ Vitória Guimarães (loan)||21||(3)|
|2005||→ Penafiel (loan)||7||(1)|
|2007||→ Leicester City (loan)||0||(0)|
|2008||→ Belenenses (loan)||6||(0)|
|* Senior club appearances and goals counted for the domestic league only.
He amassed Primeira Liga totals of 127 games and 15 goals over the course of eight seasons, representing mainly in the competition Vitória de Setúbal and Porto. He also played professionally in Spain, Japan, England and Greece.
Primarily known for his speed, Ferreira was born in Vimioso in the Bragança District, and started his career at F.C. Tirsense in the second division. In 1998 he moved to Atlético Madrid B, but only lasted a few months in Spain, finishing the season at Yokohama Flügels in the J1 League.
Ferreira would go on to represent F.C. Paços de Ferreira – also in his country's second level – where he was a key player, spending the following three-and-a-half seasons at Primeira Liga club Vitória de Setúbal. In January 2003 he joined FC Porto, being part of the José Mourinho-led squad that defeated Celtic in the 2002–03 UEFA Cup final, coming on as a substitute for Capucho in the 98th minute. He also featured in several UEFA Champions League matches in the following campaign, but was not selected for the team that won the decisive match, and also added two consecutive league championships during his time with the northerners, wearing jersey No. 78 due to his birthyear.
After that, Ferreira was loaned to Vitória de Guimarães for 2004–05. In the following year he made the same move, now to F.C. Penafiel, but was released in January 2006 and promptly signed with S.L. Benfica, until June 2009; while in Lisbon he was unable to establish himself as a first-team player, and was placed on the transfer list.
On 31 August 2007, Ferreira joined English side Leicester City on loan until the end of the year, but his contract was terminated in December after becoming unsettled in the country, making no senior appearances for the club(he was an unused substitute in a 3–2 League Cup win over Nottingham Forest on 18 September). Subsequently, he finished the campaign with C.F. Os Belenenses, also appearing very rarely.
- Primeira Liga: 2002–03, 2003–04
- Taça de Portugal: 2002–03
- Supertaça Cândido de Oliveira: 2003
- UEFA Champions League: 2003–04
- UEFA Cup: 2002–03
- "A hora de Marco Ferreira" [Marco Ferreira's time]. Record (in Portuguese). 15 January 2003. Retrieved 10 September 2015.
- "Porto end Celtic's Uefa dream". BBC Sport. 21 May 2003. Retrieved 2 October 2007.
- "Leicester recruit Benfica winger". BBC Sport. 31 August 2007. Retrieved 2 October 2007.
- "Ferreira returns to Portugal". Sky Sports. 19 December 2007. Retrieved 20 December 2007.
- "Nottingham Forest 2–3 Leicester". BBC Sport. 18 September 2007. Retrieved 16 February 2008.
- "Sílvio é o 14.º a estrear-se com Agostinho Oliveira" [Sílvio is debutant number 14 with Agostinho Oliveira]. Record (in Portuguese). 7 September 2010. Retrieved 10 June 2015.