The veteran defender has praised the appointment of Stuart Taylor as manager of the Airtricity First Division champions and believes it can bring an extra 'lift' to everyone
Former Drogheda United and St Mirren midfielder Taylor was officially unveiled as the successor to Pat Scully last week and O'Callaghan said that the Scottish coach is 'approachable'.
"He seems a good guy to be fair. He’s stated that he wants to be approachable and he seems approachable," he told the Limerick Leader. "He says he wants to play attractive attacking football which hopefully we’re able to. The training sessions were good and tough. Simple and basic but that’s what you need getting back into it.
"I was only thinking about it myself the other day and a new manager coming in with fresh ideas and a new approach could give everyone the extra lift that we need coming into the Premier Division," added the 31-year-old.
Elsewhere, Shamrock Rovers have confirmed that they will face Glebe North and Wexford Youths as they continue their pre-season schedule.
The Hoops will play Leinster Senior League side Glebe North at Balbriggan on January 29, before facing Airtricity First Division outfit Wexford Youths at Ferrycarrig Park on February 1.