He had built a reputation as a great scorer from long and middle distances, combined with high level vision and technique that made him one of the most dangerous midfielders in the region.

[7] His 6th goal for the club came against the Central Coast Mariners in Round 20,[8] a cracking free kick that went through the wall and through the legs of keeper Danny Vukovic.

He won widespread acclaim for his performance in Melbourne's 4–0 A-League semi-final second leg win over Adelaide United, in which he scored one goal and assisted for the other three.

[11] On 17 April 2009, the Costa Rican newspaper La Nación reported that Melbourne Victory and LD Alajuelense had finally come to an agreement regarding the sale of the player for an undisclosed fee believed to be in the region of $450,000[12] and his signing was officially announced by the club on 14 May.

[17] On 27 June it was announced that Hernández has signed a one-year deal with I-League club Prayag United making it one of the biggest transfers in Indian football.

[19] On 4 January 2013 against Dempo at the municipal stadium at Kalyani, he scored from an inswinging direct free kick on 87th minute to ensure a 1–0 win over the defending champions.

The playmaker was then part of the 2006 FIFA World Cup squad in Germany but managed only two substitute appearances in the group games against Ecuador & Poland.

He scored a cracker in his last international against France national football team, drilling a shot from 25 metres out into the left hand side of the net.