|Date of birth||23 March 1983|
|Place of birth||Sachsen bei Ansbach, West Germany|
|Height||1.90 m (6 ft 3 in)|
|1. FC Sachsen|
|–2003||1. FC Nürnberg|
|2003–2004||1. SC Feucht||26||(1)|
|2004–2011||FC St. Pauli||131||(8)|
|2004–2011||FC St. Pauli II||5||(0)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 22.32, 21 January 2012 (UTC).
Eger played in the youth teams of 1. FC Sachsen, SpVgg Ansbach and 1. FC Nürnberg where he played until 2003 when he moved to 1. SC Feucht. He made his debut for the club in a 1–1 draw against 1. FC Saarbrücken on 2 August 2003, coming on a substitute late in the match for Stefan Hampl, and made his first start in a 0–0 draw against FC Augsburg. On 6 September 2003, he played 90 minutes in the game in a 0–0 draw against SC Pfullendorf. Since making his debut, he established himself in the first team. On 15 November 2003, Eger scored his first goal for the club in a 2–0 win over FC Schweinfurt 05. At SC Feucht, he made 26 appearances scoring one goal.
FC St. Pauli
After one season at SC Feucht, Eger joined St. Pauli on a free transfer. On 31 July 2004, he made his debut for the club in a 1–0 win over Wuppertaler SV Borussia playing 90 minutes. On 11 December 2004, he received a red card for brutal foul, just 10 minutes coming on as a substitute in a 2–0 win over Holstein Kiel. On 5 April 2005, he made his return to the first-team in a 1–0 win over Hamburger SV II. On 26 March 2005, he scored his first goal for the club in a 4–1 win over Arminia Bielefeld.
On 6 August 2005, Eger scored his first of the 2005–06 season in a 4–0 win over Kickers Emden. On 23 August 2005, he received a red card after second bookable offence in a 2–0 loss against Fortuna Düsseldorf.
The following season 2006-07, Eger made 34 appearances, playing all the league matches of the season and having a key role at the club that was promoted to 2. Bundesliga.
In the 2007–08 season, Eger made 28 appearances.
In the following 2009–10 season, Eger made three appearances and received little playing time with centre-back pair Fabio Morena and Markus Thorandt keeping him out of the first team. Instead, Eger spent most of the season on the bench and while his first-team time was limited, he played in the reserves. During the season, Eger suffered hip problems in the start of the season. By the end of the season, the team secured promotion back to the Bundesliga for the 2010–11 season, finishing in second place.
In 2010–11, Eger again did not enjoy much playing time and spent most of the season on the bench. On 5 March 2011, he made his Bundesliga debut in a 5–0 defeat against his former youth side 1. FC Nürnberg. On 7 May 2011, he scored his first Bundesliga goal in an 8–1 loss against Bayern Munich. At the end of the season, the club finished in last place, resulting in the club's relegation to the 2. Bundesliga. Eger was released by the club as the club planned to re-build the squad. After his release, president Stefan Orth said releasing him was not easy.
On 24 June 2011, Eger signed for League 1 side Brentford on a two-year contract, with the option to extend after two years. He said in an interview that it was 'a dream come true to play in England'. On 6 August 2011, he made his debut for the club in a 2–0 win over Yeovil Town playing 90 minutes as centre-back. However, he received little playing time throughout the season. At the end of the season, Eger left Brentford.
Eger is a passionate drummer, which showed when he made a guest appearance in Bela B's second solo album Code B. He was even on the single from Black/White, represented in the German charts peaked at 83rd. Eger holds left-wing views on politics.
- "Marcel Eger". worldfootball.net. Retrieved 1 July 2011.
- "Der Abschied tut weh" (in German). Official Website of FC St.Pauli. 11 May 2011. Archived from the original on 2012-03-14. Retrieved 8 July 2012.
- "Brentford sign defenders Shaleum Logan and Marcel Eger". BBC Sport. 24 June 2011. Retrieved 25 June 2011.
- "Brentford 2 - 0 Yeovil". BBC Sport. 6 August 2011. Retrieved 8 July 2012.
- "Defender leaves Brentford". Kilburn Times. 25 May 2012. Retrieved 11 January 2013.
- "Interview with Brentford’s Marcel Eger: record shopping, politics and FC St Pauli". Regista. 8 December 2011. Retrieved 8 July 2012.