Mangold introduced Trump at a Dayton campaign rally.

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Trump touted Mangold as “number one at his position” and a great person.

Mangold, an All-Pro center in the NFL, is from Ohio and played college football at Ohio State University.

A noted conservative, Mangold campaigned with GOP presidential nominee Mitt Romney in 2012.

Mangold’s NFL team is owned by Woody Johnson, who was the Jeb Bush campaign’s finance chairman.