Sports Stats ‘on Tapp’ is a biweekly blog published every Wednesday and Friday with a bonus “SIX STATS…” posting every Friday.

Six of the eight teams that will play in the 2011 MLB postseason have been determined. The Wild Card berths are still up for grabs and we will have to wait until the final day of the season (and maybe longer!) to have a full compliment of playoff teams.

One thing is for certain… the New York Yankees are in the playoffs, a place they find themselves almost every year. In fact, the Yankees have played in 111 seasons since 1901 when the World Series began and they will be playing in their 50th postseason… a postseason appearance percentage of 45%. The surprise number two team in this stat are the Arizona Diamondbacks who have made the postseason in five of their 14 seasons (35.7%).

Here’s a look are what percentage of their franchise seasons each of the teams have played in the postseason since 1901.

Team                                                         Seasons in postseason         Total seasons             Pct

New York Yankees                                                50                                                  111                        45.0

Arizona                                                                     5                                                    14                         35.7

L.A. Dodgers                                                          26                                                  111                        23.4

Oakland                                                                  23                                                  111                        20.7

San Francisco                                                        23                                                  111                        20.7

Houston                                                                   9                                                    50                        18.0

L.A. Angels                                                              9                                                    51                         17.6

Kansas City                                                              7                                                    43                        16.3

Colorado                                                                   3                                                   19                         15.8

Chicago Cubs                                                         16                                                   111                        14.4

Toronto                                                                    5                                                    35                        14.3

New York Mets                                                       7                                                     50                       14.0

Philadelphia                                                          14                                                   111                        12.6

Pittsburgh                                                              14                                                   111                        12.6

Minnesota                                                              14                                                   111                        12.6

Detroit                                                                     13                                                   111                        11.7

Cincinnati                                                               13                                                   111                        11.7

San Diego                                                                5                                                     43                        11.6

Seattle                                                                      4                                                    35                         11.4

Florida                                                                      2                                                     19                        10.5

Baltimore                                                                11                                                   111                          9.9

Texas                                                                         5                                                    51                          9.8

Milwaukee                                                               4                                                    43                          9.3

Cleveland                                                                10                                                  111                          9.0

Chicago White Sox                                                 9                                                   111                          8.1

Washington                                                             1                                                    43                          2.3

The four teams fighting for the final two spots:

St. Louis                                                                  23                                                 110                        20.9

Atlanta                                                                    21                                                  110                        19.1

Boston                                                                    20                                                  110                        18.2

Tampa Bay                                                              2                                                    13                         15.4

WE INTERRUPT THIS BLOG FOR A TRIVIA QUESTION. What team has the longest active streak of making the postseason? Answer at end of blog.

Here’s a question for you: Does the team that had the better regular season record have an advantage over its opponents in the postseason? In looking at the playoffs from 1995 to 2010, here’s what we found… In the League Division Series, the team with the better regular season record won 33 series, lost 28 series and three series were played by teams with the same regular season record. In the League Championship Series, the team with the better regular season record won 17 series, lost 13 series and two series were played by teams with the same regular season record. In the World Series, the team with the better regular season record won 7 series and lost 9 series.

TRIVIA ANSWER: The Philadelphia Phillies have the longest active playoff streak with five straight seasons in the postseason.