Jacob Host (born 30 September 1996) is an Australian professional rugby league footballer who plays as a second-row, prop and lock for the St. George Illawarra Dragons in the NRL.
Host was born in Padstow, New South Wales, Australia.
He played his junior rugby league for Renown United, before being signed by the St. George Illawarra Dragons.
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From 2014 to 2016, Host played for the St. George Illawarra Dragons' NYC team. On 25 July 2014, he re-signed with the Dragons on a 3-year contract. In November and December 2014, he played for the Australian Schoolboys.
In round 9 of the 2016 NRL season, Host made his NRL debut for the Dragons against the New Zealand Warriors. In September, he was named on the interchange bench in the 2016 Intrust Super Premiership NSW Team of the Year. He was a member of the Illawarra Cutters side who won the 2016 Intrust Super Premiership NSW Grand Final. The following week he was part of the Cuuters side which won the state championship match against Queensland Cup winners Burleigh Bears.
Host made 11 appearances for St George in 2017 as the club went from sitting third on the table at the halfway mark of the season to end up finishing a disappointing ninth place missing the finals. Between Rounds 13 and 26, the club only managed to win 4 games including a final round loss against the Canterbury-Bankstown Bulldogs where St George only needed to win the match to finish in eighth place and make the finals.
Host managed to only make 5 appearances for St George in 2018 and mainly featured for the Intrust Super Premiership NSW side instead.
Host made a total of 17 appearances for St George in the 2019 NRL season as the club finished second last on the table.