Samuel Murray John Prattley (born 16 January 1990) is a New Zealand rugby union player who currently plays as a prop for Auckland in the ITM Cup and the Blues in Super Rugby.
Educated at Nelson College from 2007 to 2007, Prattley made his provincial debut for Tasman in 2010. He made a total of 28 appearances in his three years with the Makos. During this time, he was involved in the Crusaders and Highlanders wider training groups but did not make any Super Rugby appearances. He shifted north to Auckland for 2013 and injuries in the Blues front-row saw him brought in as emergency cover. He made a total of four appearances during the 2013 Super Rugby season before linking up with Auckland for the 2013 ITM Cup where helped his side to a semi-final place.