The 1906 Cubs and 2001 Mariners hold the MLB record for most victories in a season with 116.
This year's Cubs are on pace to tie that record.
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After Monday's 6-4 win over the Phillies, the Cubs (40-16) are the fastest team to 40 wins since the Mariners in 2001.
Jon Lester helped his own cause by striking out nine over eight scoreless innings and adding a double in the victory. After his double, Lester scored on Jason Heyward's 100th career home run.
"Back to the Future II" may have predicted a 2015 World Series championship for the Cubs, who haven't won it all since 1908.