[1] Prendergast grew up in County Kildare and began playing rugby with Newbridge RFC (Ireland) at mini's level.
[6] In May 2022, and with one year on his deal still to run, Connacht announced a new longer term contract to keep him at the club until 2025.
[10] In November 2022, Prendergast was named on the bench and subsequently gained his first full cap in a test victory against Fiji.
The following August Prendergast won his second cap off the bench against Italy and was then selected for his first international start at number eight against England.
[17] However, before entering the field of play he withdrew from the match day squad through illness, being replaced by Ryan Baird.