Marijuana use derailed Jon Singleton’s baseball career. Now he’s back and wonders, what if

 Marijuana use derailed Jon Singleton’s baseball career. Now he’s back and wonders, what if

The former top prospect, now 31, wonders what his career could have been if marijuana currently legal in 23 states was taken off the banned substances list sooner.
HOUSTON (AP) In 2018, Jon Singleto…