Grateful is correct. The junior year is the info year, letters invites to camps, junior days, and now I understand a phone call in March.
Take this year as an opportunity to research each school your son is getting interest from, instead of waiting for July 1st.
Recruiting time is very stressful for your son, many will attest to that. As a parent you can help to relieve that stress by helping him to narrow his choices as early as possible. On July 1st my son got a lot of calls, the following week much less, as he had told many coaches that first week he was not interested in their program.