The Houston Astros' former No. 1 overall prospect was just banned 162 games ... and, no, it has nothing to do with the team's cheating scandal.
The MLB announced Francis Martes -- a pitcher who was touted as the team's next big thing back in 2016 -- has been suspended for a full season for testing positive for PEDs.
It's the second time Martes has been busted for violating the league's drug policy ... in March 2019, he was banned 80 games after a positive drug test.
Martes was a BEAST early in his career ... ranking as high as 15th overall on MLB prospect lists -- but he's struggled to reach his potential so far.
In his first big-league action with Houston in 2017, he posted a 5.80 ERA in 54.1 innings pitched. In 2018, he underwent Tommy John surgery.