Complex sentence: On 29 October 2011 he made his return to Mexico with the IWRG event, where he defeated Pierroth Jr. On 12 December, he once again defeated Pierroth Jr in a singles match.
Split into simpler sentences: On 29 October 2011 he made his return to Mexico with The IWRG event. Where he defeated Pierroth Jr. On 12 December, he Once again defeated Pierroth Jr in a Singles Match.