Sports Reference Blog

Baseball Records Through A Calendar Day

Posted by Alex Bonilla on September 12, 2018

This season, the Boston Red Sox have been on quite a tear, with a .683 winning percentage after their September 11th win over Toronto. Now you can compare them with other teams through September 11 using our new Records Through Calendar Day tool in the Play Index. Since 1969 (the beginning of the Divisional Era), the 2018 Red Sox have the fifth-best winning percentage of any team through September 11. Here's a look at the top 10:

Best Win-Loss Percentage Through September 11 Table
Year Tm Lg Standings W L W-L% GB Final W-L Rank Postseason
2001 SEA AL On This Day 104 40 .722 - 116-46 1 Division Champ
1998 NYY AL On This Day 103 42 .710 - 114-48 1 WS Champ
1995 CLE AL On This Day 88 38 .698 - 100-44 1 AL Pennant
1969 BAL AL On This Day 99 45 .688 - 109-53 1 AL Pennant
2018 BOS AL On This Day 99 46 .683 - 99-46 1
1986 NYM NL On This Day 93 46 .669 - 108-54 1 WS Champ
1979 BAL AL On This Day 94 48 .662 - 102-57 1 AL Pennant
2004 STL NL On This Day 93 48 .660 - 105-57 1 NL Pennant
1975 CIN NL On This Day 96 50 .658 - 108-54 1 WS Champ
Provided by Baseball-Reference.com: View Original Table
Generated 9/12/2018.

Another storyline earlier in the season was how impressive the Angels' 12 wins and the Mets' 11 wins through April 13 were. Of course, since then those two teams have fallen out of the playoff race, but searching for the other teams in recent memory that have racked up wins early in the calendar show that April success is very hit or miss in informing rest-of-season performance. Here's a look at teams in past seasons with double-digit wins through April 13:

Most Wins Through April 13 Table
Year Tm Lg Standings W L W-L% GB Final W-L Rank Postseason
2003 SFG NL On This Day 11 1 .917 - 100-61 1 Division Champ
2002 CLE AL On This Day 11 1 .917 - 74-88 3
1998 SDP NL On This Day 11 2 .846 - 98-64 1 NL Pennant
2014 MIL NL On This Day 10 2 .833 - 82-80 3
2013 ATL NL On This Day 10 1 .909 - 96-66 1 Division Champ
Provided by Baseball-Reference.com: View Original Table
Generated 9/12/2018.

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