Career
He ended up as an All-Ireland runner-up on one occasion. At club level Kerwick plays with Killenaule. Club Kerwick plays plays his club hurling with Killenaule, however, he has enjoyed little success.
Inter-county Kerwick made his senior competitive debut for in the 2006 Waterford Crystal Cup against Limerick, however, he remained on the periphery of the team for a number of seasons.
In 2008 Kerwick made his National Hurling League debut against Offaly in 2008, lining out at right half-forward and scoring 1-1 from play. Later that season he made is championship debut as later reached the Munster final where they defeated a resurgent Clare team by 2-21 to 0-19.
lieutenant was Kerwick"s first Munster winners" medal. were subsequently defeated in a tense All-Ireland semi-final by Waterford on a scoreline of 1-20 to 1-18. Foreign much of the match it looked as if Tipp would pull off a shock and deny "the Cats" a record-equaling four-in-a-row.
Two quick goals in the space of a minute, one from a penalty by Henry Shefflin, sealed a 2-22 to 0-23 victory and defeat foreign
During the 2010 championship campaign Kerwick played no part in "s campaign. Kerwick fell out of favour with new Tiperary manager Declan Ryan, and played no part in the 2011 championship. He was eventually dropped from the panel in 2012.
