Early career In 2014, Jennings played for the Penrith Panthers'
NYC team. In November and December 2014, he played for the
Australian Schoolboys. In 2015, he moved on to the Panthers'
New South Wales Cup team.
Penrith Panthers (2015–2016) In round 7 of the
2015 NRL season, Jennings made his
NRL debut for Penrith against the
Gold Coast Titans. On 2 May 2015, he played for the
Junior Kangaroos against
Junior Kiwis. On 8 July 2015, he played for the
New South Wales Under-20s team against the
Queensland Under-20s team. At the time, he was contracted with Penrith until the end of 2016. Jennings was named in Penrith's squad for the
2016 NRL Auckland Nines. After not receiving any game time in the
2016 NRL season, Jennings signed a one-year contract with the
South Sydney Rabbitohs starting in 2017. In September, he was named at centre in the 2016 NYC Team of the Year.
South Sydney Rabbitohs (2017–2018) Jennings was named in South Sydney's squad for the
2017 NRL Auckland Nines. He made his South Sydney debut against the
Manly Warringah Sea Eagles in round 2, scoring a try and setting one up for teammate
Robbie Farah. In round 3 of the
2018 NRL season, Jennings scored his first hat-trick of tries while playing for South Sydney in their 34–6 win over the Manly Warringah Sea Eagles at
ANZ Stadium. In round 14 he scored four tries in the club's 42–24 smashing of the
Parramatta Eels at ANZ Stadium. Jennings finished off the 2018 season with 19 tries.
Wests Tigers (2019–2020) On 21 February 2019, Jennings signed a two-year deal with the
Wests Tigers after he was released by South Sydney. Jennings made a total of 18 appearances for the
Wests Tigers in the
2019 NRL season as the club finished ninth on the table and missed out on the finals. On 28 September 2020, Jennings was one of eight players released by the
Wests Tigers.
Penrith Panthers (2021–2022) Jennings returned to
Penrith on a one-year deal. He made three appearances for Penrith in the
2021 NRL season, mainly filling in during the
State of Origin period. Jennings only played four NRL games in the
2022 NRL season and spent the majority of his time playing for Penrith's
NSW Cup team. Jennings played for Penrith in their 2022 NSW Cup Grand Final victory over
Canterbury. On 2 October, Jennings played in Penrith's 44–10 victory over
Norths Devils in the
NRL State Championship final.
Dolphins (2022-23) In May 2022, Jennings signed a two-year contract with the
Dolphins. In round 7 of the
2023 NRL season, he made his club debut for the Dolphins against the
South Sydney Rabbitohs at
Suncorp Stadium. In round 8, he scored two tries in the Dolphins 28–26 victory over the
Gold Coast Titans at Suncorp Stadium. File:Robert_Jennings_Jan_2024.jpg| Jennings in Brisbane File:Dolphins NRL signing for fans January 2024.jpg|Jennings seated on left File:Robert_Jennings_standing.jpg| Jennings side-on File:Robert_Jennings_and_Mark_Nicholls.jpg| Jennings (centre) and
Mark Nicholls == Post NRL (2024-present) ==