It might not be long before another Vaughn is circling the basepaths in the MLB ... 'cause Mo Vaughn tells TMZ Sports his 11-year-old son is showing signs of being a serious baller on the diamond!!
The former AL MVP said this week Lee Vaughn has impressed him so far when he's gotten in between the white lines at ballparks ... telling us, "I honestly think he has a lot better tools than I ever had."
Mo said his offspring bats left, throws right .