I'm hoping he had a brain fart when he said Mare...
Why Mare?
2000: Missed field goal against the Jets costing the fins a first round bye
2002: Missed field goal and a kickoff out of bounds in the finale against NE
2003: Missed two field goals that could have buried the Patriots Dynasty before it ever got started and put the Dolphins in the playoffs
That's two playoff berths right there, with two very talented teams.
2005: Another missed field goal against NE
2006: Four key missed field goals, noteably against the Jets.
Carpenter cost them the playoffs in 2012, and possibly 2011.