What a finish we had in the NASCAR Xfinity Series race. For the second year in a row, Sam Mayer wins in a walk-off at the Roval. Mayer is now on his way to the Round of 8. He had to win a week after a DQ at Talladega, and he did just that. It is hard to win an Xfinity Series race. To repeat a win at a track is even more difficult. To do that to advance to the second round of the playoffs two years in a row? Call it whatever you want, Sam Mayer just did it. CLICK HERE to go to PrizePicks and use code ON3 to receive a guaranteed $50 once you play $5 in lineups! This race did have a bit of contro…