Ex-Astros OF/3B J.D. Davis INSISTS he NEVER saw any of his Houston teammates cheat ... despite 'Stros pitcher Mike Fiers claim the squad used high tech gadgets to steal signs.
Davis -- now a member of the New York Mets -- was with the Astros from 2017-2018 ... smack in the middle of when the team's accused of cheating.
Remember, Fiers -- a starting pitcher -- recently told The Athletic that the 2017 Astros used a camera to steal signs from opposing catchers ... and then relayed the info (what pitch was coming) to 'Stros batters by banging on a garbage can.