hmm, it might if he gets up every time they make a little noise.
But if he keeps them out, hesitates awhile to see if they can settle themselves down -- nail biting I know! -- it might work and start the process for them to learn to self soothe at night.
I found that if my boys slept in my room, they wouldn't sleep through and I was there "crutch" to settle again... moved the crib out.
I know space wise, that might not be an option.
Keep a journal, nap/eat/bedtimes.. might help you figure out what is waking them: too hot? too cold? wet diaper? Too long of nap in the evening throwing off the night time sleep? Growth spurt, maybe a few more ounces or solids? ( Can't remember what ages the big growth spurts happen)
Or you could just have restless sleepers, which totally sucks!! N to this day still gets up at night, too much like his dad.
I like this article
http://www.askdrsears.com/html/7/T070300.asp
I smiled while reading it, I did some of these approaches just out of instinct. Laying hand on the back, pat pat the butt.