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Peyton Manning's 4-year-old son led stretches for the Broncos before their preseason game

Another Manning graced pro football on Thursday, showing off his excellent technique at one of the most important aspects of the pregame routine: Stretching.

Marshall Manning, 4, is the son of Broncos quarterback Peyton Manning and possibly the cutest person to warm-up on the field.

(AP Photo/Matt York)

(AP Photo/Matt York)

Denver Broncos quarterback Peyton Manning, right, stretches with his son, Marshall Manning, 4, prior to an NFL preseason football game against the the Arizona Cardinals, Thursday, Sept. 3, 2015, in Denver. (AP Photo/Matt York) ORG XMIT: COMY

(AP Photo/Matt York) O

(AP Photo/Matt York)

(AP Photo/Matt York)

Game Face On.

(AP Photo/Matt York)

(AP Photo/Matt York)

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