Complex sentence: Leali returned to Juventus on 30 June 2013, before being loaned to Serie B side Spezia Calcio on 30 July 2013.
Split into simpler sentences: Leali returned to Juventus on 30 June 2013. Upon his Juventus return, he was once again loaned out, to Serie B side Spezia Calcio on 30 July 2013.