It does look like annual ryegrass. This website has some of images of the key identifying features. http://purdueturftips.blogspot.com/2013/04/annual-ryegrass-showing-up-in-lawns.html
If is it annual rye, 1) keep mowing to avoid the seedheads from developing too much and 2)make sure you have a prem barrier. Other than hand pulling, the best will be to wait until the summer heat takes care of it.