Failed marijuana tests nearly ended Jon Singleton's career. Now
Jon Singleton of Houston Astros discusses marijuana addiction - ESPN
Jon Singleton loses his roster spot - Beyond the Box Score
Jon Singleton (baseball) - Wikipedia
Astros' Jon Singleton Has Storybook Return to Houston for First
Jon Singleton hits 1st HR in 8 years, then does it again in Astros
Jon Singleton hits 1st HR in 8 years, then does it again in Astros
Jon Singleton's Remarkable Journey Back to the Big Leagues
Jon Singleton eyes second chance at Brewers Minors camp
Houston Astros' Jon Singleton suspended 100 games for failed drug test
Jon Singleton hits 1st HR in 8 years, then does it again in Astros