Rookie phenom Jordan Walker breaks down after being told he's made Cardinals' roster

Baseball fans just can't get enough of these kinds of stories. Even if they happen multiple times every spring.

A young player who works hard in camp is rewarded with the news that he's won a spot on the opening day roster. And his reaction is priceless.

That's how things played out Saturday when 20-year-old Jordan Walker was called into St. Louis Cardinals manager Oliver Marmol's office for a chat.

"The separator when watching you this entire camp was very simple. When you faced adversity, you weren't bothered by it," Marmol said as Walker waited patiently for the words he hoped to hear.

"You deserve every bit of being with us opening day."

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And there was much rejoicing.

A third baseman-turned-outfielder, Walker hit .304 with 19 home runs, 22 stolen bases and an .894 OPS last season at Class AA Springfield (Mo.), but he played his way onto the Cardinals' opening day roster with a strong performance in spring training (.286/.308/.508 with three home runs, 19 runs scored and nine RBI in 65 plate appearances).

He'll be the youngest player to make his MLB debut with the Cardinals since Rick Ankiel in 1999.