In 2002, an eight-year-old Pledger starred in writer-director Emma Freeman's short film Lamb. The following year, Pledger began appearing as Lewis Harfield in the drama series CrashBurn. Pledger starred as Tycho Everson in the science fiction children's series Silversun in 2004. Pledger has also made appearances in The Secret Life of Us, Welcher & Welcher, Scooter: Secret Agent and Nick Giannopoulos' film The Wannabes.
Pledger joined the cast of Neighbours as student Noah Parkin in 2011. Pledger's agent told him about the role and asked him to read through Noah's character notes. After deciding that he wanted the role, Pledger attended a screen test with the Neighbours casting director. After a recall, Pledger was told he had the role. He was contracted for six months. In 2014, Pledger appeared in the Nine Network television film Schapelle.
On 5 December 2015, Jonathon Moran of The Daily Telegraph reported Pledger had joined Home and Away as Mason Morgan, the youngest member of the new Morgan family.Pledger relocated from Melbourne to Sydney for filming. He choose to leave the role in 2019, and his character was killed off in the season finale on 27 November.
- (2001) The Secret Life of Us - James
- (2002) Lamb - Son
- (2002) Marshall Law - Freddie
- (2002) Blue Heelers - Scott Robbins
- (2003) Forbidden - Boy at Gate
- (2003) Welcher & Welcher - N/A
- (2003) Criminal Ways - Young Danny
- (2003) The Forest - James
- (2003) Crashburn - Lewis Harfield
- (2004) Replacing Bradley - Bradley
- (2004) Silversun - Tycho Everson
- (2005) Scooter: Secret Agent - Beast Boy
- (2005) McLeod's Daughters - Max Wakefield
- (2006) Blue Heelers - Olek Jasinski
- (2011-2012) Neighbours - Noah Parkin
- (2014) Schapelle - James
- (2014) House Husbands - Ian
- (2016-2019) Home and Away - Mason Morgan