The Colorado Rockies selected Young in the 30th round of the 2003 Major League Baseball draft, and he signed rather than attend college.

[5] Young made his major league debut on August 25, 2009, for the Colorado Rockies playing center field.

On September 8, 2009, Young Jr. hit his first career home run in the bottom of the 6th inning against the Cincinnati Reds.

When Young stepped late on the bag, his cleat dug hard into Hudson's ankle full stride, unnaturally rolling it.

Young signed a minor league contract with the Atlanta Braves on February 13, 2015.

[13] Young had a batting average of .153 with no home runs, five RBIs and .217 on-base percentage with both the Braves and the Mets in 2015.

On January 5, 2016, Young signed a minor league contract with the Milwaukee Brewers, with an invitation to spring training.

[15] Center field was one of the last positions the Brewers decided,[16][17] but Young did not make the Opening Day roster.

On May 31, Young hit a game-winning solo home run in the eighth inning to give the Angels a 2–1 lead against the Atlanta Braves.

In 110 at bats, Young tied a career high by hitting 4 home runs; he was outrighted and elected free agency after the season.

On February 9, 2019, the Baltimore Orioles signed Young Jr. to a minor league contract that included an invitation to spring training.

[22] On March 26, 2019, Young Jr. signed a minor league deal with the Seattle Mariners.

On January 27, 2021, Young Jr. was announced to be part of the coaching staff of the Tacoma Rainiers, Triple-A affiliate of the Seattle Mariners.