Some of the biggest American track stars are competing in Philly this weekend .

Olympic gold medalists Sydney McLaughlin-Levrone and Gabby Thomas will headline the field for Grand Slam Track, a new and innovative track league that launched this year.

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When are the Team USA athletes hitting the track? Where is everything taking places? And how can you watch them?

Here are all the details for Grand Slam Track in Philly:

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What is Grand Slam Track?

Grand Slam Track is a professional league founded by Olympic champion Michael Johnson, who earned four gold medals for Team USA from 1992 to 2000.

The first season is ongoing, with fou

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