An examination of the below auction lot (the bottom four from similar era) will show that yours is, in fact, a 1911 Boston Red Sox stub. Notice the same typeface used for the 1910 example. The problem with your stub is that it's missing a money shot, i.e. the name ("Boston American League") of the club and related logos/artwork: so WE know it's a 1911 ticket stub but only after some research.
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