July 30, 20187 yr Moderators Mack will take over as crew chief for JRM’s No. 5 Chevrolet team and driver Michael Annett in the Xfinity Series beginning this weekend at Watkins Glen (N.Y.) International. Mack replaces Jason Stockert.Mack, 35, is a former employee of Hendrick Motorsports and JR Motorsports, dating back to 2004. During the 2014-15 season, he held the role of car chief on JRM’s No. 9 Xfinity entry ... Keep reading View the full article
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