#22-Brad Keselowski was fastest during opening practice at Watkins Glen International with a speed of 122.200mph.
The rest of the top 10: #18-Kyle Busch, #12-Joey Logano, #2-Paul Menard, #42-Kyle Larson, #7-Justin Allgaier, #20-Erik Jones, #41-Kevin Harvick, #00-Cole Custer, and #3-Ty Dillon.
36 drivers practiced during the session.
See complete results on the Watkins Glen practice 1 speeds page (pdf).
