Mahoney has joined the Championship club on loan from Bournemouth for the rest of the season.
After arriving from Blackburn in the summer, the 20-year-old failed to cement a spot in Eddie Howe's side and he's now excited to get some playing time with the Tykes.
"I am buzzing," he said. "I want to get out there now and get this team up the table.
"I am excited about the way the team play – it's very good football. They like to play along the floor and the gaffer is a big part of me deciding to come here."