Born in La Pobla de Segur, Lleida, Catalonia, Bertrán began playing football for his local club as future FC Barcelona's Carles Puyol before him.
[2] He finished his development in RCD Espanyol's academy and played once for the first team in 2001–02,[3] going on to make a further 16 La Liga appearances over the next two seasons; in the second part of 2004–05, he served a relegation-ending loan spell at Córdoba CF in the Segunda División.
[6][7][8] In 2009–10, as Tenerife were relegated in the last matchday, Bertrán appeared in 21 matches, netting in the penultimate round, a 2–2 home draw against UD Almería.
[12] Bertrán retired aged 34, following second-tier spells with CD Leganés (after not being registered by Recreativo de Huelva)[13] and Real Zaragoza.
[14] In his only cap for the Spain under-21 side, on 10 October 2003, Bertrán played the entire 2–0 away victory over Armenia for the 2004 UEFA European Championship qualifiers.