Alex Rodriguez -- Sure, Take My Miami Palace ... for $38 Million

Alex Rodriguez is putting his time on the NY Yankees disabled list to good use ... by jumping in the real estate game and unloading his GIANT Miami mansion for a whopping $38,000,000. Cha-ching!

A-Rod bought the super modern crib back in 2010 -- while it was still under construction -- for a reported $24 mil. But now he's looking to sell off the 20,000-square-foot pad and make a cool profit at the same time.

The 9-bedroom, 11-bath beachfront estate is freaking AMAZING if you've got the cash. It offers 275 ft. of water frontage, a home theater, a heated pool, gym, rooftop deck, an elevator AND a 3,000 square-foot sports room complete with a batting cage.