Some people might say it's only April or we have 130 more games to go. While it may be true, strong start plays important roles. Motivation, team chemistry, momemtum, etc.
Current 1st place teams are:
ALE: Boston Red Sox
ALC: Detroit Tigers
ALW: Texas Rangers
NLE: Atlanta Braves
NLC: St. Louis Cardinals
NLW: LA Dodgers
Now let's look at the teams in 1st place on the last day of first three months.
April 30: BOS, DET, TEX, ATL, STL, COL
May 31: BOS, DET, TEX, ATL, STL, ARI
JUN 30: BOS, DET, TEX, ATL, PIT (STL 2ND), ARI
Except the Dodgers, all other 5 1st placed teams to begin the season hold their places currently. And for the Dodgers, what are the chances to have the run like they did? Good start of the season always does matter.