Career
Paddy is a loose-head prop who joined the Ulster squad on a development contract at the start of the 2010-2011 season after impressing in club rugby with Ballynahinch. He went on to make 22 appearances in that season, including 10 starts. The former Ireland Schools, U19 and U20 international has become a big favourite with the crowd at Ravenhill.
He left Ulster in 2014, to join French club Aurillac in the Pro D2 during the 2014-2015 season.
On 29 January 2015, McAllister moves to England to join Gloucester Rugby in the Aviva Premiership from the 2015-2016 season. McAllister is a devout Christian.