Born in Newcastle, New South Wales, Anderson played his junior football for the West Maitland Reddogs and Kurri Kurri Bulldogs before being signed by the Newcastle Knights. He played for the Knights' NYC team in 2011. At the end of the 2011 season, Anderson was named the Knights' NYC Player of the Year and the Players' Player of the Year. In October 2011, Anderson was forced to decide on whether to sign with the Penrith Panthers or re-sign with the Knights. Phil Gould, the coaching director of the Panthers, offered an easier path to first-grade football with the loss of prop Petero Civoniceva. However, Wayne Bennett, the coach of the Knights, personally told Anderson that he was in his future plans for the Knights. On 21 October 2011, Anderson re-signed with the Knights on a 1-year contract. In September 2012, Anderson signed a one-year contract with the Penrith Panthers starting in 2013 after failing to make first-grade with the Knights in 2012. In Round 9 of the 2013 NRL season, Anderson made his NRL debut for the Panthers against the Melbourne Storm. On 17 July 2013, Anderson played for the New South Wales Residents against the Queensland Residents. On 22 September 2013, Anderson was named on the interchange bench in the 2013 New South Wales CupTeam of the Year. In October he was also named as the Panthers New South Wales Cup Player of the Year, so capped off a very successful 2013. On 9 July 2014, Anderson again played for the New South Wales Residents against the Queensland Residents. On 21 September 2014, Anderson was named on the interchange bench in the 2014 New South Wales Cup Team of the Year for the second year in a row. On 3 May 2015, Anderson played for the New South Wales Residents against the Queensland Residents for the third year in a row. He added another NRL game to his tally and captained the Panthers' New South Wales Cup team. At the end of the 2015 season, Anderson was recruited by the Redcliffe Dolphins to play in the Queensland Cup Competition in 2016 and 2017. He was named as the team's captain for 2016. In May 2016, Anderson was selected to represent the Queensland Residents as starting prop against New South Wales, for whom he had played the previous three seasons. Anderson was voted 2016 Prop of the Year in the Intrust Super Cup competition and was third in the Daily Courier Player of the Year voting. He led the Dolphins to the 2016 Minor Premiership. They were scheduled to challenge Burleigh Bears for the Major Premiership at Suncorp Stadium on 25 September 2016. The Dolphins were unsuccessful going down to the Bears 26 to 16. Sam was also awarded the Redcliffe Dolphins Player of the Year in 2016. Anderson has again had a very successful year, being selected in the Queensland Residents team which defeated NSW 36 to 6, and was again named in the Queensland Cup Team of the Year at the QRL Major Awards night, this time in his preferred position at Lock. This is his fifth year in a row, representing both States. The Dolphins have again had an excellent year, finishing second, 1 point behind Minor Premiers PNG Hunters, Sam will lead his team in the Qualifying final to be played in PNG on September 10. Redcliffe lost 4 to 6 in PNG then were beaten the following week vs Sunshine Coast Falcons 42 to 6. Sam was approached by the French 2nd Division team Toulouse and was set to join the team when it was realized that the eligibility rules for players had changed and he did not qualify. Sam re-signed with the Dolphins for 2018 and again had an excellent year playing in the middle. He was chosen to represent Queensland in the State Cup representative team, unfortunately going down 36 to 16 in the Curtain Raiser to State of Origin at Sydney Olympic Stadium. This made Anderson the only player to have been capped for 6 consecutive years, 3 for each state. Redcliffe went on to win the State title in 2018 vs Easts Tigers 36 to 22 but were beaten in the State Cup Championship 42 to 18 by Canterbury Bulldogs. Anderson retired from State Cup football and returned home to Maitland where he Captained the Maitland Pickers to a finals spot in the real NRL. He had a mixed year with injury costing him 6 games but was again one of the strongest players when on the field. He has signed for another year at Maitland and hopes for more success in 2020.
