By AMANDA VINCENT The NASCAR Xfinity Series begins its 2019 with a few rules changes. The most immediately noticeable of those changes will be the shrunken race field, down from 40 to 38 cars. Also, NASCAR made the task of winning the Xfinity Series owners’ championship harder for teams putting Cup Series drivers in its […] The post NASCAR Xfinity: 2019 changes include smaller race fields appea...