Complex sentence: He scored his first goal for Southampton with a free kick in a 2--0 win over Leicester City in the FA Cup, and his first league goal came from a penalty against Scunthorpe United while playing with a broken arm.
Split into simpler sentences: He scored his first goal for Southampton with a free-kick in a 2--0 win over Leicester City in the FA Cup. Vignal scored his first league goal for Southampton against Scunthorpe United from a penalty whilst playing with a broken arm.