WATCH: Sam Mayer flips out of the lead in wild finish to NASCAR Xfinity Series season opener at Daytona | CBS Sports Headlines WATCH: Sam Mayer flips out of the lead in wild finish to NASCAR Xfinity Series season opener at Daytona Mayer was sent sliding down the backstretch on … Continue reading WATCH: Sam Mayer flips out of the lead in wild finish to NASCAR Xfinity Series season opener at Daytona