Complex sentence: On 22 October he scored his first professional goal, netting the first in a 2--3 loss at Sevilla FC; he was regularly used as a left winger and central midfielder during the season, as his team suffered relegation.
Split into simpler sentences: On 22 October he scored his first professional goal, netting the first in a 2--3 loss at Sevilla FC. Bigas was regularly used as a left winger and central midfielder during the campaign, as his side suffered relegation.