[5] During this stint, he was instrumental as the Canary Islands side returned to the top flight after a seven-year-absence by scoring a career-best 20 goals, fourth-best in the competition.

[6][9] Returned to Sevilla for 2010–11, Alfaro benefitted from Navas' absence due to injury and featured in some games early into the season, scoring in a 2–1 defeat of Málaga CF on 19 September 2010.

[11] The following week, he also found the net in two home fixtures, against Valencia CF (2–0, appearing as a second-half substitute)[12] and Real Unión (6–1, in the round of 32 of the Copa del Rey).

In September 2020, he signed with CA Osasuna as a scout, having been offered this position by Braulio Vázquez and "Cata" Prieto, who worked as sporting directors and knew Alfaro from their time at Valladolid.

[23][24] Alfaro's two brothers were also footballers: Juan José (1981), a midfielder, graduated from FC Barcelona's La Masia, but spent his entire career in Segunda División B or lower.