|Full name||Guzmán Casaseca Lozano|
|Date of birth||26 December 1984|
|Place of birth||Badajoz, Spain|
|Height||1.79 m (5 ft 10 1⁄2 in)|
|2006||→ Xerez (loan)||12||(0)|
|2006–2007||→ Córdoba (loan)||39||(7)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 27 August 2017.
Born in Badajoz, Extremadura, Guzmán graduated from CD Badajoz's youth setup, and made his debuts as a senior with the B-team in 2002. He first appeared with the main squad on 15 December of that year, coming on as a late substitute in a 1–1 home draw against SD Eibar for the Segunda División championship.
In January 2005, Guzmán moved to RCD Mallorca B in Segunda División B. After one season at Xerez CD in the second level, he was loaned to Córdoba CF on 7 July 2006, contributing with seven goals to the latter's promotion from division three and signing a permanent deal shortly after.
Guzmán scored his first professional goal on 13 June 2009, netting his team's only in a 1–3 away loss against Real Zaragoza. On 1 July, he signed a two-year deal with CD Castellón also in the second tier.
In 2010, Guzmán joined AD Ceuta in the third division. After scoring 15 goals in 2011–12, he signed for fellow league club Deportivo Alavés; he appeared regularly for the latter side, and on 5 July 2014 agreed to a two-year contract with UD Las Palmas.
- "Polémica en Badajoz" [Controversy in Badajoz]. Mundo Deportivo (in Spanish). 16 December 2002. Retrieved 23 June 2015.
- "El Córdoba acuerda con el Mallorca la cesión por una temporada de Guzmán, ex del Xerez" [Córdoba agrees with Mallorca one-season loan of Guzmán, formerly with Xerez]. ABC (in Spanish). 7 July 2006. Retrieved 23 June 2015.
- "El Zaragoza vuelve a Primera por la puerta grande" [Zaragoza returns to Primera in style]. Marca (in Spanish). 13 June 2009. Retrieved 23 June 2015.
- "El Castellón ficha a Guzmán Casaseca por dos temporadas" [Castellón sign Guzmán Casaseca for two seasons]. Marca (in Spanish). 1 July 2009. Retrieved 23 June 2015.
- "El delantero Guzmán, duodécimo fichaje del Alavés" [Forward Guzmán, twelfth signing of Alavés]. El Correo (in Spanish). 19 July 2012. Retrieved 23 June 2015.
- "Guzmán Casaseca, nuevo jugador de la UD Las Palmas" [Guzmán Casaseca, new player of UD Las Palmas] (in Spanish). UD Las Palmas. 5 July 2014. Archived from the original on 23 June 2015. Retrieved 23 June 2015.
- "Guzmán Casaseca rescinde contrato con la UD Las Palmas" [Guzmán Casaseca terminates contract with UD Las Palmas] (in Spanish). UD Las Palmas. 16 July 2015. Archived from the original on 17 July 2015. Retrieved 16 July 2015.
- "Guzmán potencia las bandas" [Guzmán brings power to the wings] (in Spanish). Real Valladolid. 17 July 2015. Retrieved 17 July 2015.