Colin Patrick Walsh (born September 26, 1989) is an American former professional baseball second baseman.

On June 4, 2016, the Brewers returned Walsh to the Oakland Athletics for $25,000, and he was assigned to the Triple-A Nashville Sounds.

[13] On July 29, 2017, Walsh signed a minor league contract with the Houston Astros organization.

In 34 games split between the Double–A Corpus Christi Hooks and Triple–A Fresno Grizzlies, he hit .146 and .266, respectively, with a total of 1 home run and 7 RBI.

On July 13, 2018, Walsh was traded to the Kansas City T-Bones of the American Association of Independent Professional Baseball.