Jamaica’s teenage sprint sensation Gary Card shattered the national junior record in the men’s 100m when he blazed to a new mark of 9.93 seconds in the final of the men’s 100m at the National Senior Championships on Friday at the National Stadium.Card become the second Jamaican teenager to dip below the 10-second barrier and erased Bouwahjgie Nkrumie’s previous record of 9.99.He finished second behind the reigning world and national champion Oblique Seville who took the title in 9.82, and just ahead of Ackeem Blake, third in 9.94.