Be careful, in order for him to come back for an additional season he must finish his senior season with a cumulative GPA of 2.7 or higher (he's sitting at 2.9 right now).
From the HD FAQ:
Q: How does the eligibility process work? Can I still recruit players that are currently ineligible by WCAA standards?
A: Not all players will pass the WCAA Initial Eligibility Clearinghouse requirements. What that means is that for DI and DII recruits, they must meet both GPA and SAT score requirements. In DI and DII, the requirements are on a sliding scale, the lower the GPA, the higher the SAT score requirement. To play at DIII, the recruit must only have a high school GPA of 2.0 or higher.
If a recruit does not qualify, he may or may not still attend your school as they have to pay their own way the first year. They can not be on scholarship and they can not practice (although they will reserve a scholarship for the next season). At DI schools, the player will only have 3 years of eligibility (depending on their collegiate gpa, they may be granted a 4th year of eligibility if they maintain a 2.7 cumulative GPA or higher) - in both situations, if they choose to play their 4 year of eligibility they will be playing as 5th year Seniors.