Most overtime goals in playoffs (career):

6 - Maurice Richard, Montreal (1 in 1946, 3 in 1951, 1 in 1957, 1 in 1958)
5 - Glenn Anderson, Edmonton, Toronto, NY Rangers, St Louis
4 - Bob Nystrom, NY Islanders
– - Dale Hunter, Quebec, Washington
– - Wayne Gretzky, Edmonton, Los Angeles
– - Stephane Richer, Montreal, New Jersey
– - Joe Murphy, Edmonton, Chicago
– - Esa Tikkanen, Edmonton, NY Rangers
– - Jaromir Jagr, Pittsburgh
– - Kirk Miller, Montreal, Dallas
– - Joe Sakic, Colorado
 

Most overtime goals, one playoff year:

3 - Mel Hill, Boston, 1939. All against NY Rangers in best-of-seven SF, won by Boston 4-3
– - Maurice Richard, Montreal, 1951. 2 against Detroit in best-of-seven SF, won by Montreal 4-2, 1              against Toronto best-of-seven F, won by Toronto 4-1

Most overtime goals, one playoff series:

3 - Mel Hill, Boston, 1939, SF vs NY Rangers, won by Boston 4-3. Hill scored at 59:25 of overtime Mar.
—21 for a 2-1 win, at 8:24, Mar. 23 for a 3-2 win, and at 48:00, Apr. 2 for a 2-1 win.

Most Goals Scored by a Defenseman in a Playoff Season:

12 - Paul Coffey, Edmonton, 1985. 18 games
11 - Brian Leetch, NY Rangers, 1994. 23 games
9  - Bobby Orr, Boston, 1970. 14 games
   - Brad Park, Boston, 1978. 15 games
8  - Denis Potvin, NY Islanders, 1981. 18 games
— - Raymond Bourque, Boston, 1983. 17 games
— - Denis Potvin, NY Islanders, 1983. 20 games
— - Paul Coffey, Edmonton, 1984. 19 games

Most goals by a defenseman, one game:

3 - Bobby Orr, Boston, Apr. 11, 1971 at Montreal.
Final score: Boston 5, Montreal 2
– - Dick Redmond, Chicago, Apr. 4, 1973 at Chicago.
Final score: Chicago 7, St Louis 1
– - Denis Potvin, NY Islanders, Apr. 17, 1981 at
New York. Final score: NY Islanders 6, Edmonton 3
– - Paul Reinhart, Calgary, Apr. 14, 1983 at Edmonton.
Final score: Edmonton 6, Calgary 3
– - Paul Reinhart, Calgary, Apr. 8, 1984 at Vancouver.
Final score: Calgary 5, Vancouver 1
– - Doug Halward, Vancouver, Apr. 7, 1984 at Vancouver.
Final score: Vancouver 7, Calgary 0
– - Al Iafrate, Washington, Apr. 26, 1993 at Washington.
Final score: Washington 6, NY Islanders 4
– - Eric Desjardins, Montreal, Jun. 3, 1993 at Montreal.
Final score: Montreal 3, Los Angeles 2
– - Gary Suter, Chicago, Apr. 24, 1994, at Chicago.
Final score: Chicago 4, Toronto 3
– - Brian Leetch, NY Rangers, May 22, 1995 at
Philadelphia. Final score: Philadelphia 4, NY Rangers 3
– - Andy Delmore, Philadelphia, May 7, 2000 at
Philadelphia. Final score: Philadelphia 6, Pittsburgh 3.

Most assists by a defenseman, one playoff year:

25 - Paul Coffey, Edmonton, 1985. 18 games
24 - Al Maclnnis, Calgary, 1989. 22 games
23 - Brian Leetch, NY Rangers, 1994. 23 games
19 - Bobby Orr, Boston, 1972. 15 games
18 - Ray Bourque, Boston, 1988. 23 games
— - Ray Bourque, Boston, 1991. 19 games
— - Larry Murphy, Pittsburgh, 1991. 23 games

Most assists by a defence, one game:

5 - Paul Coffey, Edmonton, May 14, 1985 at Edmonton vs Chicago. Edmonton won 10-5
– - Risto Siltanen, Quebec, Apr. 14, 1987 at Hartford. Quebec won 7-5

Most points by a defenseman, one playoff year:

37 - Paul Coffey, Edmonton, in 1985. 12 goals, 25 assists in 18 games
34 - Brian Leetch, NY Rangers, in 1994. 11 goals, 23 assists in 23 games
31 - Al Macinnis, Calgary, in 1989. 7 goals, 24 assists in 22 games
25 - Denis Potvin, NY Islanders, in 1981. 8 goals, 17 assists in 18 games
— - Ray Bourque, Boston, in 1991. 7 goals, 18 assists in 19 games

Most points by a defenseman, one game:

6 - Paul Coffey, Edmonton, May 14, 1985 at Edmonton vs Chicago. 1 goal 5 assists. Edmonton won 10-5
5 - Eddie Bush, Detroit, Apr. 9, 1942, at Detroit vs Toronto.1 goal 4 assists. Detroit won 5-2
– - Bob Dailey, Philadelphia, May 1, 1980, at Philadelphia vs Minnesota. 1 goal, 4 assists. Philadelphia won 7-0
– - Denis Potvin, NY Islanders, Apr. 17, 1981, at New York vs Edmonton. 3 goals, 2 assists. NY Islanders won 6-3
– - Risto Siltanen, Quebec, Apr. 14, 1987, at Hartford. 5 assists. Quebec won 7-5

Most goals by a rookie, one playoff year:

14 - Dino Ciccarelli, Minnesota, 1981. 19 games
11 - Jeremy Roenick, Chicago, 1990. 20 games
10 - Claude Lemieux, Montreal, 1986. 20 games
9  - Pat Flatley, NY Islanders, 1984. 21 games
8  - Steve Christoff, Minnesota, 1980. 14 games
— - Brad Palmer, Minnesota, 1981. 19 games
—- Mike Krushelnyski, Boston, 1983. 17 games
— - Bob Joyce, Boston, 1988. 23 games

Most points by a rookie, one playoff year:

21 - Dino Ciccarelli, Minnesota, in 1981. 14 goals,
7 assists in 19 games
20 - Don Maloney, NY Rangers, in 1979. 7 goals,
13 assists in 18 games

Most three-or-more-goal games in playoffs (career):

10 - Wayne Gretzky, Edmonton, Los angeles, St. Louis, NY Rangers. 8 three-goal games; 2 four-goal          games.
7 - Maurice Richard, Montreal, 4 three-goal games, 2 four-goal games, 1 five-goal game.
   -Jari Kurri, Edmonton, 6 three-goal games, 1 four-goal game.
6 - Dino Ciccarelli, Minnesota, Washington, Detroit. 5 three-goal games, 1 four-goal game.
5 - Mike Bossy, NY Islanders. 4 three-goal games, 1 four-goal game.

Most three-or-more-goal games, one playoff year:

4 - Jari Kurri, Edmonton, 1985. 1 four-goal game, 3 three-goal games.
3 - Mark Messier, Edmonton, 1983. 3 three-goal games.
– - Mike Bossy, NY Islanders, 1983. 1 four-goal game, 2 three-goal games.
2 - Newsy Lalonde, Montreal, 1919. 1 five-goal game, 1 four-goal game.
– - Maurice Richard, Montreal, 1944. 1 five-goal game, 1 three-goal game.
– - Doug Bentley, Chicago, 1944. 2 three-goal games.
– - Norm Ullman, Detroit, 1964. 2 three-goal games.
– - Phil Esposito, Boston, 1970. 2 three-goal games.
– - Pit Martin, Chicago, 1973. 2 three-goal games.
– - Rick MacLeish, Philadelphia, 1975. 2 three-goal games.
– - Lanny McDonald, Toronto, 1977. 1 three-goal game, 1 four-goal game.
– - Wayne Gretzky, Edmonton, 1981. 2 three-goal games.
– - Wayne Gretzky, Edmonton, 1983. 2 four-goal games.
– - Wayne Gretzky, Edmonton, 1985. 2 three-goal games.
– - Petr Klima, Detroit, 1988. 2 three-goal games.
– - Cam Nelly, Boston, 1991. 2 three-goal games.
– - Wayne Gretzky, NY Rangers, 1997. 2 three-goal games.
– - Daniel Alfredsson, Ottawa, 1998. 2 three-goal games.

Most three-or-more-goal games, one playoff series:

3 - Jari Kurri, Edmonton, 1985, CF vs. Chicago won by Edmonton 4-2. Kurri scored 3 goals May 7 at Edmonton in 7-3 win, 3 goals May 14 in 10-5 win and 4 goals May 16 at Chicago in 8-2 win
2 - Doug Bentley, Chicago, 1944, SF vs Detroit, won by Chicago 4-1, Bentley scored 3 goals Mar. 28 at Chicago in 7-1 win and 3 goals Mar. 30 at Detroit in 5-2 win
– - Norm Ullman, Detroit, 1994, SF vs Chicago, won by Detroit 4-3, Ullman scored 3 goals Mar. 29 at Chicago in 7-1 win and 3 goals Apr. 7 at Detroit in 7-2 win
– - Mark Messier, Edmonton, 1983, DF vs Calgary won by Edmonton 4-1, Messier scored 4 goals Apr. 14 at Edmonton in 6-3 win and 3 goals Apr. 17 at Calgary in 10-2 win
– - Mike Bossy, NY Islanders, 1983, CF vs Boston won by NY Islanders 4-2, Bossy scored 3 goals at New York in 8-3 win and 4 goals on May 7 at New York in 8-4 win

Longest consecutive goal-scoring streak, one playoff year:

10 games - Reggie Leach, Philadelphia, 1976. Streak started Apr. 17 at Toronto and ended May 9 at Montreal. He scored 1 goal in each of eight games, 2 in one game, and 5 in another, a total of 15 goals

Longest consecutive point-scoring streak, one playoff year:

18 games - Bryan Trottier, NY Islanders, 1981. 11 goals, 18 assists, 29 points
17 games - Wayne Gretzky, Edmonton, 1988. 12 goals, 29 assists, 41 points
                 - Al Maclnnis, Calgary, 1989. 7 goals, 19 assists, 26 points

Longest consecutive point-scoring streak, more then one playoff year:

27 games - Bryan Trottier, NY Islanders, 1980, 1981 and 1982. 7 games in 1980 (3G, 5A, 8PTS), 18 games in 1981 (11G, 18A, 29PTS), and 2 games in 1982 (2G, 3A, 5PTS). Total points, 42
19 games - Wayne Gretzky, Edmonton, Los Angeles, 1988 and 1989.17 games in 1988 (12G, 29A, 41PTS with Edmonton), 2 games in 1989 (1G, 2A, 3PTS with Los Angeles). Total points, 44.