You can see in the footage, the guys were both so laser-focused on the ball ... neither saw each other, and slammed their bodies together HARD.
The collision was nasty -- it popped Baddoo's hat straight off his head -- and both men landed on the ground with a ton of force.
The guys were able to walk off the field after a lengthy delay ... but, afterward, Detroit manager A.J. Hinch said the two were dealing with injuries.
Manager A.J. Hinch updates the injury status of Derek Hill and Akil Baddoo following a nasty collision in the Tigers' 9-4 victory over the Orioles at Camden Yards on Monday night. #Leinenkugelspic.twitter.com/R1cVYTjOGR