The 1969 Major League Baseball season was celebrated as the 100th anniversary of professional baseball, honoring the first professional touring baseball team, the Cincinnati Red Stockings.

It was the first season of what is now called the "Divisional Era", where each league of 12 teams was divided into two divisions of six teams each. The winners of each division would compete against each other in a League Championship Series, then best-of-five, to determine the pennant winners that would face each other in the World Series.
In a year marked by the second expansion of the decade, the New York Mets and the Baltimore Orioles faced each other in the 1969 World Series. Having won the N.L. East Division with a league-best 100–62 record, and sweeping the N.L. West Division Champion Atlanta Braves in three games in the first National League Championship Series, the "Miracle Mets" became the first expansion team to win a pennant. They faced the A.L. East Division Champion Orioles, holders of the best record in baseball (109–53), who swept the A.L. West Division Champion Minnesota Twins in three games in the first American League Championship Series. The upstart Mets would upset the heavily favored Orioles and win the World Series title in five games. Taken from https://en.wikipedia.org/wiki/1969_Major_League_Baseball_season

Final Stats:

Team	Wins	Losses
BAL	109	53
NYM	100	62
MIN	97	65
ATL	93	69
CHC	92	70
DET	90	72
SFG	90	72
CIN	89	73
PIT	88	74
OAK	88	74
STL	87	75
BOS	87	75
WSA	86	76
LAD	85	77
HOU	81	81
NYY	80	81
CAL	71	91
KCR	69	93
CHW	68	94
SEP	64	98
PHI	63	99
CLE	62	99
MON	52	110
SDP	52	110
Postseason
WorldSeries (4-1):	New York Mets over Baltimore Orioles
ALCS (3-0):	Baltimore Orioles over Minnesota Twins
NLCS (3-0):	New York Mets over Atlanta Braves
Most Runs per game: 5
MIN
Fewest Runs allowed per game: 3
BAL
Regular Season ran from: 4/7-10/2
Playoffs ran from: 10/4-10/16
Best Division: AL West
Worst Division: NL West