In 2011, Dean was 5–7 with a 5.00 ERA in 20 starts for the Beloit Snappers, Fort Myers Miracle and New Britain Rock Cats.

Dean split 2013 between the Rock Cats and Rochester Red Wings and went 9–13 with a 4.04 ERA in 28 starts.

In 19 games during his rookie campaign, Dean struggled to a 1–6 record and 6.28 ERA with 50 strikeouts across 67+1⁄3 innings pitched.

[8] On November 26, 2016, Dean signed a one-year, $900,000 contract with the Kia Tigers of the KBO League.

[10] In 2017 season, he helped KIA Tigers to win the 2017 Korean Series against Doosan Bears.

On April 18, 2019, Dean signed with the Southern Maryland Blue Crabs of the Atlantic League of Professional Baseball.

[12] On March 9, 2020, Dean signed with the Somerset Patriots of the Atlantic League of Professional Baseball.

[13] He did not play a game for the team because of the cancellation of the ALPB season due to the COVID-19 pandemic and became a free agent after the year.