Tristan Thompson's Kardashian spawn ain't just gonna make him more famous ... it could damn well make him a better basketball player -- so says NBA vet Jim Jackson.
We got J-Jax at Cafe Gratitude in L.A. ... and he told us why knockin' up Khloe might translate to a fiercer Tristan on the hardwood.
"Having a child always settles you down a little bit," Jackson told TMZ Sports. "Maybe a kid settles him down and gives him more focus."
Seems like Jim isn't buying into the Kardashian curse -- basically saying TT should be good as long as he keeps handling business for the Cavs.
But Jackson's main message for the (now official) future parents -- congrats!!
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