Shawn plays at prop for OPSB and the United States. He has also represented his country at under-19 and under-20 levels. His debut for his country was against Uruguay on 8 November 2008.
He played at the 2011 Rugby World Cup.
Shawn started playing rugby when he was 18, after being persuaded to take up the sport by some rugby playing friends. He first played representative rugby for the United States. in 2006.
He was selected for the United States. squad for the Under 19 World Junior Championships in Belfast in 2007. 2007 was also a memorable year for Pittman as he got the unique opportunity to undertake the International Rugby Academy of New Zealand"s Advanced Course at Massey University in Palmerston North, where he met the likes of Grant Fox.
In 2008 he played for the United States national under-20 team in the first-ever Institutional Review Board Junior World Championship in Wales.
Shawn played in all five matches and scored two tries in the defeats to Fiji and South Africa. Pitman made his senior debut for the United States of America Eagles against Uruguay in November 2008. Shawn also featured against the England Saxons in 2009.
Pittman joined London Welsh in the summer of 2010 from Canadian side Bayside Sharks, having previously gained Super League experience in the United States. with Golden Gate.
Pittman and the Eagles beat Russia 32-25 to clinch the 2011 Churchill Cup Bowl at Sixways in England in June. Pittman was selected to the squad for the 2011 Rugby World Cup in New Zealand, where he started two of the United States of America"s four matches.