Complex sentence: After being definitely promoted to the main squad in the 2013 summer, Guerrero was an important offensive unit in the 2014--15 campaign, scoring 11 goals in 36 appearances; highlights included braces against CD Lugo and Racing de Santander, both in May 2015.
Split into simpler sentences: After being definitely promoted to the main squad in the 2013 summer, Guerrero was an important offensive unit in the 2014--15 campaign, scoring 11 goals in 36 appearances. Highlights included braces against CD Lugo and Racing de Santander, both in May 2015.