Posted by ESPN.com's James Walker
The former Steelers assistant left Pittsburgh to join the Cardinals, and now those two teams will face off in Super Bowl XLIII.
Grimm said he always wishes his former team the best and still keeps in contact with members of Pittsburgh's coaching staff to discuss football.
"We talk every now and then," Grimm said. "If we have a common opponent or something that we may have played, maybe we'll talk about something they did or we did."