Very unlikely. It's pretty much a part of the valve cover (I think it is in there and then peened to hold...not sure.)

If you think it might be fallen loose...take off the hose where it hooks to the valve cover and poke a screwdriver in the hole. If you get quick resistance then the baffle is there. If you don't, either you don't have a baffle or its loose (should be able to hear it hit your screwdriver).