Born in San Fernando, Cádiz, Andalusia, Collantes was a Villarreal CF youth graduate and made his senior debut with farm team CD Onda in the 2001–02 season, in the Segunda División B.
He competed at that level the following six years, representing Palamós CF, Racing de Santander B and Rayo Vallecano, achieving promotion to Segunda División with the latter in 2008 while scoring a career-best 12 goals.
[1][2] Collantes made his professional debut on 30 August 2008, playing the last 25 minutes of the 1–0 home win against Real Murcia after coming on for Míchel.
[4] In January 2010, after being rarely used during the campaign, Collantes joined division three side Granada CF, and was a regular starter in their two consecutive promotions.
[8] After contributing regularly to the club's immediate promotion, he was deemed surplus to requirements by manager Pacheta[9] and returned to UCAM on 31 August 2018.