Mike Tomlin isn’t using the Pittsburgh Steelers’ trip to Ireland as a reason to offer up a history lesson about what the team and the Rooney family mean to Ireland.

There’s no need.

Yes, the team’s ties to the Emerald Isle run deep. Yet Tomlin knew Hall of Famer and former U.S. ambassador to Ireland Dan Rooney — still known almost universally as Mr. Rooney nearing a decade after his death — well enough to know how Rooney would feel if the Steelers spent the run-up to Sunday’s game against Minnesota at Croke Park in Dublin reveling in the past and not the task at hand.

“This is a business trip,” Tomlin said before Pittsburgh left for the NFL’s first regular-season game in Dublin.

Besides, the club hardly needs an overseas trip to Rooney’s homeland as an opportunity to talk about what th

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