Eminem -- Targets Adrian Peterson ... In New Rap Attack

Ray Rice wasn't the only athlete in Eminem's cross-hairs -- the rapper also dropped a few lines about Adrian Peterson's child abuse case on his new album.

Em takes aim in a new song called, "Detroit Vs. Everybody" on his new compilation album "Shady XV" -- in which he spits the following lyrics:

"What's makin' you think I need a switch? I'm Adrian Peterson ...
When he's raging and heated and on the way to go beat his kid ...
On the track I spank like he just did."

So far, no response from AP.