 At the latter club, he amassed competitive totals of 272 matches and 75 goals, while in La Liga alone he scored 56 times from 180 appearances.Born in Usurbil, Gipuzkoa, Agirretxe was a product of Real Sociedad's youth system.He first appeared with the first team in 2004–05, amassing three substitute appearances – during his second, a 1–3 home loss against Málaga CF on 15 May 2005, he managed to score after just 16 minutes on the pitch; in the following three seasons combined, however, he only played nine league matches, and also served a six-month loan spell at CD Castellón in the second division.