Stack first joined the Kerry senior team during the 1985/86 National League, where he played in six games. He played in the first round of the Munster championship when Kerry overcame Tipperary. He played no other games during the season but did pick up an All-Ireland medal as a panel member when Kerry beat
Tyrone. He played in all of Kerry's 1986/87 National League campaign. He played no part in the championship. He returned to the team for the 1989/90 League. He played his first championship game in four seasons when he lined out in the Munster final against Cork. It wasn't a good day for the Kingdom however as they suffered one of their biggest losses to Cork on a 2–23 to 1–11 scoreline. In 1991 Kerry had a first championship win over Cork since 1986 to book a Munster final with
Limerick. The game went to extra-time but Kerry came out on top to give Stack a first Munster medal on the field of play. Kerry later lost out to
Down in the All-Ireland semi-final. Wins over Cork and
Limerick saw Stack and Kerry back in the Munster final, where they faced
Clare. It looked like a second Munster title was in store, but in one of the all time championship upsets Clare won the title. Despite playing in the latter half of the 1992/93 National League Stack lost his place on the panel for the championship and would be in the wilderness for the next number of seasons. He returned during the 1995/96 National League after a few seasons away. He missed out on the Munster championship first round but was back for the semi-final win over
Waterford. He later lined out in a first Munster final since 1992 when Kerry faced Cork. In the end Kerry won out 0–14 to 0–11 to give Stack his second Munster medal. Kerry later lost out to
Mayo in the All-Ireland semi-final. Stack missed much of Kerry's National League and championship games in 1997. He played no part in the Munster championship but was back in the team for the All-Ireland semi-final. He was Left Corner Back as Kerry beat Cavan to book a first All-Ireland final since 1986. Where he had been a sub in 1986 he was in the starting 15 for the clash with
Mayo. In the end Kerry did enough to take the title and give Stack his second All-Ireland medal and first on the field of play. He played in all of Kerry's 1997/98 National League games, including the first round clash with Cavan in
New York. He later won his third Munster medal after Kerry overcame Tipperary in the final. Kerry's season came to an end when they lost out to
Kildare in the All-Ireland semi-final. This was his last championship game with Kerry. ==References==