Complex sentence: Romero began his career in club TIGRES in mexico reserves then spent time playing in the lower leagues of Germany for TSG Thannhausen towards the end of 2010 and was later with Murciélagos of the Segunda División de México in 2011.
Split into simpler sentences: Romero began his career Tigres UANL in Mexico's reserve league, then spent time playing in the lower leagues of Germany for TSG Thannhausen towards the end of 2010. He was later with Murciélagos of the Segunda División de México in 2011.