Complex sentence: Used sparsely throughout the season, on 23 July 2014 he was loaned to Mainz 05 for one season with the option to make the move permanent for €12.5M.
Split into simpler sentences: Used sparsely throughout the season, he was loaned to 1. FSV Mainz 05 (Mainz) for one season on 23 July 2014, with the option to make the move permanent for €12.5M.