found this.......pay attn to “corporate sponsorship” and i was surprised to see the volunteer may recruit more than we realized.....
“The "third assistant" or "volunteer assistant" as it's often called, is paid from other sources available to the program. Typical sources include camp revenues, corporate sponsorship (i.e. equipment contracts), and radio/TV shows. It's also not unusual for third assistants to serve as paid clinic/camp instructors and/or summer team coaches when their college duties don't conflict.
As you might imagine, the compensation associated with these third assistantships can vary quite a bit from program to program; depending upon the size and number of non-university revenue sources associated with each program. However, they are invariably full-time, paid assistantships; causing the term "volunteer assistant" to be a misnomer. Because of this, more and more programs are dropping the "volunteer" part and referring to this person simply as an "assistant coach."
As full-time assistants, they are usually asked to be involved in a wide range of coaching responsibilities; although, their background will tend to cause them to spend more time on either the hitting or pitching side of the coaching to be done.
More often than not, they are given a full seat at the coaching table. However, there is one enforced distinction from the NCAA: They usually cannot travel expressly for recruiting purposes. I say "usually" because the actual regulation stipulates that no more than 3 coaches may be designated as traveling recruiters. However, they can be actively engaged in correspondence with recruits (subject to other general restrictions, of course), and they can recruit when on their own campus. “