Is this a Cannon ball?

Can anyone here say for sure that this is a cannon ball?
My brother - in - Law dug this up from about 2 feet down. 
Was found in Lake Co., Fl.
and what the value of this cannon ball?
maybe a 4lbs ball.

Thanks,
Lucky Find

Could be.
History buff’s cannonball hits neighbor’s home
Pa. man faces charges, including reckless endangerment, but no one hurt

UNIONTOWN, Pa. - A Pennsylvania history buff who recreates firearms from old wars accidentally fired a 2-pound cannonball through the wall of his neighbor's home.

Fifty-four-year-old William Maser fired a cannonball Wednesday evening outside his home in Georges Township that ricocheted and hit a house 400 yards away.

The cannonball, about two inches in diameter, smashed through a window and a wall before landing in a closet. Authorities say nobody was hurt.