To say Mallex Smith is the worst Mariners player right now is fair. To say he is the worst offensive player in the game right now is not a stretch. Fangraphs has him at -0.6 fWAR, which is the 6th worst in all of baseball.
He looks incapable at the plate slashing .178/.272/.267 thus far. But it is not just that he is struggling at the plate. He is also amongst the worst defensive outfielders in all of baseball. It’s not just the balls that are popping out of his glove, which is annoying. But overall, he tied for 3rd worst in defensive runs saved (DRS) with -5 (zero is average).