Jonathan Hassler will make his debut as a full-time crew chief during the NASCAR Cup Series’ All-Star Race weekend at Texas Motor Speedway, taking charge of Matt DiBenedetto and the No. 21 Wood Brothers Racing team.
Hassler, a longtime race engineer at Team Penske, has recent crew chief experience after commanding the No. 21 crew to a 12th-place finish in April at Martinsville Speedway and stepping in for Joey Logano’s crew chief, Paul Wolfe, last month at Dover International Speedway.
Starting with this weekend’s all star race in Texas, Jonathan Hassler will assume the crew chief role for our 21 Mustang.
We want to thank Greg Erwin for leading our team for the previous three seasons.
— Wood Brothers Racing (@woodbrothers21) June 8, 2021
Hassler is replacing veteran crew chief Greg Erwin, who spent the last three-plus seasons heading up the No. 21 team.
DiBenedetto currently sits 17th in the playoff standings, one spot below the cutline.
Hassler’s first test will be during Sunday’s NASCAR All-Star Open (6 p.m. ET, FS1, MRN and SiriusXM NASCAR Radio).