Barring the late-hour signing of an offensive lineman — which would be the only player at that position in the 2013 recruiting class — Boston College football coach Steve Addazio expects to gather letters-of-intent from 15 recruiting prospects Wednesday during national signing day.

Among them will be four defensive linemen, including three-star prospect Tevin Montgomery, a 6-foot-5-inch, 295-pounder from Marion, who was rated by Rivals.com as the third-best player in Massachusetts.