After being released by the Dynamo following the 2014 MLS season , Arena returned to the Pittsburgh .
After being released by the Dynamo following the 2014 MLS season , Arena signed for the Riverhounds for the 2015 USL season .
After being released by the Dynamo following the 2014 MLS season , Arena returned to the Pittsburgh and signed for the Riverhounds for the 2015 USL season .