John Smoltz Selling Insane GA Mansion With Baseball Field for $5.2 Million

John Smoltz's incredible Georgia estate -- complete with a baseball field, basketball court, football field, golf course AND a pool -- is hitting the market ... and it's listed at a whoppin' $5.2 MILLION!!!

Not only is the 19-acre property a sports fan's paradise ... it's also got a HUGE mansion with 10 bedrooms and 10 bathrooms!!!

The crib, listed by Harry Norman Realtors agent Alex McGraw, comes with several master suites, a chef's kitchen, multiple bars and an office.

There's also a room in the house called the "Gentlemen's Study" -- which we think is a super fancy way of saying "Man Cave."

And, if privacy is your thing, this place is locked up tighter than a drum -- double gates to keep out the riffraff and a gated parking court so nobody scuffs your Bentley.

Seriously, check out the pics. The place is awesome.

The Hall of Famer had the home built in 2002 -- and has put it on the market in the past -- but we're told he's more motivated than ever to sell!!!

According to the listing agent, the estate was appraised earlier this year ... and the asking price is way LESS than its appraisal value. So yeah, you're getting a steal!!!

Of course, Smoltz is an Atlanta legend and spent the majority of his career with the Braves, and reportedly made more than $135 MILLION during his 21-year MLB career.