Baptiste played for the Broncos' NYC team from 2009 to 2011, scoring 28 tries in 67 games and being named at in the 2011 NYC Team of the Year. In 2009, he represented the Queensland under-18 team in their 24-6 loss to New South Wales under-18. In Round 12 of the 2011 NRL season, Baptiste made his NRL debut for the Broncos in their 34-10 loss to the Manly-Warringah Sea Eagles at Suncorp Stadium. He scored the first try of his NRL career in the Broncos' Round 16, 16-12 loss to the South Sydney Rabbitohs in Perth, Western Australia. Baptiste only played 1 game for the Broncos in 2012, in the Broncos' 30-6 win over the Canberra Raiders at Suncorp Stadium, spending much of the season playing for the Norths Devils, one of the Broncos' feeder teams, in the Queensland Cup. In 2012 and 2013, he played for the Queensland Residents against the New South Wales Residents.
Canberra Raiders
On 18 November 2013, Baptiste signed a 1-year contract with the Canberra Raiders starting in 2014. On 3 September 2014, Baptiste re-signed with the Raiders on a 2-year contract. In 2016, Baptiste became a crucial member of the Raiders team, playing in 24 of their 27 matches. On 7 May 2016, he made his international debut for Papua New Guinea against Fiji in the 2016 Melanesian Cup. On 17 November 2016, Baptiste re-signed with the Raiders on a two-year deal. In December 2016, Baptiste ruptured his Achilles during pre-season training, which saw him miss half of the 2017 NRL season. He returned in Round 14 of the 2017 season, playing just 11 games for the Raiders. In late 2017, he represented Papua New Guinea at the 2017 Rugby League World Cup, playing four games.
Leigh Centurions
On 18 December 2017, Baptiste joined English Championship club Leigh Centurions on a one-year deal. On 4 March 2018, after playing just one game for the club, he was granted a release from his contract due to personal and family reasons.
Sydney Roosters
On 14 March 2018, Baptiste returned to Australia, signing a one-year deal with the Sydney Roosters. In June, he came off the interchange for Papua New Guinea in their 26-14 win over Fiji. He made just 9 appearances for the Roosters during the 2018 NRL season, spending the majority of the season playing for their Intrust Super Premiershipfeeder club, the Wyong Roos.
North Queensland Cowboys
On 11 October 2018, Baptiste joined the North Queensland Cowboys on a one-year deal. After missing the entire pre-season and first two rounds due to injury, Baptiste played two games for the Northern Pride, the Cowboys' Queensland Cup feeder club. In Round 5 of the 2019 NRL season, Baptiste made his debut for the Cowboys in their loss to the Melbourne Storm. Baptiste played just eight more games for the Cowboys in 2019 before tearing his anterior cruciate ligament in Papua New Guinea's loss to Samoa in June, ruling him out for the season. On 13 September 2019, it was announced that he would not be re-signed by the Cowboys. In 2020, he joined the Easts Tigers in the Queensland Cup.
