Between 2008 and 2022, Baker played for the New Zealand Sevens team in 233 World Rugby Sevens Series games and a total of 53 international tourments. In his rugby sevens career, he won 12 World Rugby Sevens Series tournaments, five World Rugby Sevens Series titles (2011, 2012, 2013, 2014, 2020), two gold medals at the Commonwealth Games (2010, 2018), two gold medals and one silver medal at the Rugby World Cup Sevens (2013, 2018, 2022) and a silver medal at the Olympic Games (2020).[2]
Upon leaving school, Baker was contracted by the Manawatu Rugby Union. In his second year out of school he was a part of Manawatu's 2008 national provincial championship squad. He was spotted by coach Dave Rennie and had signed with Manawatu at just 20 years old.[3] Baker made his debut for Manawatu in the 2008 Air New Zealand Cup competition, coming on as a replacement against Auckland in a Ranfurly Shield match.[4] He went on to make his starting debut against Wellington, whilst also scoring his first professional rugby union try.[5]
Returning to Manawatu for the 2009 Air New Zealand Cup, Baker scored three tries, the province's second top try scorer of the year along with three fellow players. He also was suspended from all rugby for eight weeks after allegedly verbally abusing assistant referee Zarne Johnson in a competition match between Hawke's Bay and Manawatu. Baker was also charged with allegedly threatening Johnson.[6]
Highlanders
Baker was signed by the Highlanders after an impressive ITM Cup and New Zealand sevens campaign in 2010; he signed a two-year deal with the Otago-based Super Rugby franchise.[7] A stress fracture in his back – which he suffered in Delhi winning gold at the Commonwealth Games – had ruled Baker out of all rugby for three months.[8] Though he was expected to overcome the injury before the 2011 Super Rugby season started, a scan in February showed the fracture had not mended and he was subsequently released by the Highlanders to their wider training group and was then replaced in the Highlanders squad by Kade Poki.[9]
Andre Taylor was Taranaki's preferred fullback throughout 2011, but Baker, who had re-signed with Taranaki through until the end of 2012, was recalled by the Highlanders despite lasting just one full game during the shortened ITM Cup season.[10] He eventually made his debut for the Highlanders in the third round of the 2012 Super Rugby season, coming on as a replacement against the Waratahs in Dunedin.[11] Baker made a further four appearances and scored two tries, one such try against the Blues in round nine saw him chase a kick at pace to what ended up being the winning try.[12]
Baker did not return to the Highlanders for the 2013 Super Rugby season,[13] but instead signed with the Crusaders as a member of their wider training group.[14] In November 2013, Baker returned to the Highlanders after a successful ITM Cup campaign as a member of the Taranaki side that won the 2014 ITM Cup Premiership over Tasman. He signed with the side for two years after putting aside his sevens career to concentrate on Super Rugby.[15]
Taranaki
In December 2009, Baker decided to move north to Taranaki along with Manawatu teammate Andre Taylor, who both signed with the union on a two-year deal.[16] He made his debut for the province starting at fullback against Northland in round one of the 2010 ITM Cup.[17] After being sidelined throughout the 2011 Super Rugby season with a stress fracture in his back, the injury eventually improved and he managed to play several games for Taranaki in their 2011 ITM Cup campaign.[18] Baker also featured in the squads infamous Ranfurly Shield win over Southland.[19][20] Heading into the 2012 ITM Cup, he had scored nine tries in nineteen games for the province.
Baker made an immediate impact with his decisive running and ability to spot a gap for Taranaki in 2012. His ability to put a player into space also caught the eye. He finished the year as the first-choice fullback. At the end of the 2013 ITM Cup season, Baker was nominated for the Taranaki Sportsman of the Year award after a stand-out season. While he missed out on that award, Baker was given the Back of the Year award, Personality of the Year award and Try of the Year award for his superb try against Bay of Plenty.[21]
After a six-week ban for a dangerous tackle in the Highlanders' round 8 game against the Rebels,[22] Baker badly tore a hamstring in club rugby in Dunedin. After working his way back to fitness, he finally got a start for Taranaki against Northland in the 2014 ITM Cup, only to suffer an AC joint injury just a few minutes into the game.[23] However, he finished the season on a high, after being a part of Taranaki's narrow victory over Tasman at Yarrow Stadium to win the province's first ITM Cup Premiership title.[24] Baker scored five tries and made a further eleven appearances in 2015.
Zebre
On 18 June 2016, Italian Pro12 club Zebre announced that Baker would join the Italian club for the 2016–17 season.[25][26] During that season, Baker played 517 minutes in 9 games (starting in 7) for Zebre and scored one try for the club in their game against Glasgow Warriors.[27] Baker did not return to Zebre for the second year of his contract.[28][29]
In 2010, Baker secured a permanent position in the New Zealand Sevens squad, playing in all six tournaments. In the Hong Kong Sevens, he led the New Zealand team in scoring four tries in their semi-final win over Fiji and two tries in their Cup final loss to Samoa.[40] He was also the top individual try scorer and point scorer of the tournament.[41] Later in 2010, Baker was named in Gordon Tietjens' squad for the Commonwealth Games in Delhi, India.[42] He was a stand-out in the final against Australia, coming on as a replacement and scoring one of the winning tries to ensure the team the gold medal.[43]