McMahon went 1-for-4 with a walkoff three-run homer in Saturday's win over the Dodgers.
The 23-year-old has now homered in consecutive games and is batting .344 with six extra-base hits in 14 games since his most recent recall. He's still not playing every day, but McMahon is worth stashing in a lot of leagues as he has the skill set to be valuable if regular playing time were to open up.