Full speed ahead: DK Metcalf set to take on elite sprinters

The newest sprinter in the game is tall just like world-record holder Usain Bolt and has quite an explosive burst — off the line of scrimmage, anyway.

DK Metcalf will soon see just how quick he is from a different line, the starting line.

The speedy Seattle Seahawks receiver is scheduled to trade his football cleats for track spikes Sunday as he ventures into a new, faster lane for a 100-meter competition at the USA Track and Field Golden Games in Walnut, California.

He will put his feet to the test against Olympic-caliber sprinters. It's a decision that definitely caught the attention of the track world, where athletes have for years been challenged by anyone, in any sport, who just happens…