He signed for Leicester for the 2006 season, along with fellow Leinster forward Leo Cullen, winning the English Premiership in 2007 and scoring a try in the final.
[2] In October 2009 he was banned for twelve weeks for making contact with the eye area of Nick Kennedy of London Irish in the first round of the Heineken Cup.
[4] Jennings's international ambitions were hampered largely due to a surplus of quality Irish back row forwards during his playing career.
[5][6] He wasn't initially named in Ireland's squad for the 2011 Rugby World Cup,[7] but was then called up after an injury to David Wallace.
[10] Jennings grew up in Cremorne in Knocklyon, County Dublin, but moved to Rathfarnham with his mother Joan(and his two brothers) and her partner Norman Young when his parents separated in the early 1990s.