On February 24, 2011, Petrone joined Swedish club
Mjällby AIF. He made his professional debut for the club on April 3, 2011, in a 1–0 loss to
Helsingborgs IF. On 26 July 2012, he signed for Icelandic
1. deild karla club
Leiknir on loan until the end of the season. He went on to play nine matches for the club, scoring his only goal for Leiknir in his penultimate appearance in the 3–2 away win against
Höttur. Petrone returned to the United States on January 30, 2014, signing with
USL Pro club
Rochester Rhinos. ==References==