Belmont resident and accomplished marathon runner Becca Pizzi is running her 16th Boston Marathon on Monday. 

This year, she’ll be running just one day after getting engaged. 

Pizzi’s boyfriend proposed to her as she stood on the pitcher’s mound at Fenway Park before Sunday’s Red Sox game. 

She said yes and then threw out the ceremonial first pitch. 

The 35-year-old became the first American woman to complete the World Marathon Challenge in January. 

She ran seven marathons on seven continents in seven days. 

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