The number of 3's made in a single playoff game was 20!
In the Super Bowl era (playoffs from 1966-2008) that would be the Cleveland Browns who, since 1966, have made the playoffs 14 times and played 20 playoff games but never played in a Super Bowl.
I do not know the most, but Cleveland and Pittsburgh have met 110 times. Both winning 55 games.
23
6 Jaguars vs Browns 11/21/10 The Jaguars won that game after handing the ball over 6 times. The Browns only made a combined 3 points from the turnovers.
55
153 pts.
Matt Sundin
57
Walter Jones
Donyell marshall
who holds the record for most 3 pointers made in a playoff game and how many from the san antonio spurs