Kennefick was just eighteen-years-old when he was appointed captain of the Cork team in 1943. A 2–13 to 3–8 defeat of Waterford that year gave him a second Munster medal. He later lined out in a second All-Ireland decider with Antrim becoming the first Ulster side to qualify for a final. Unfortunately, the occasion got to the Glensmen as Cork built up an unassailable 3–11 to 0–2 half-time lead. The final score of 5–16 to 0–4 gave Cork their second-ever hat-trick of All-Ireland titles while it also gave Kennefick a third All-Ireland medal and the honour of collecting the Liam MacCarthy Cup.