Yes, if we can prove that the coach was negligent. If the coach knew that your son never played football before, didn’t give him any instructions on how to properly tackle, and just told him to tackle another boy, then you may be able to bring a lawsuit on behalf of your son.
The coach had a duty to teach and coach your son on how to properly tackle without getting hurt. When anyone does something for the first time, there has to be some guidance on how to do it. In a situation like this, the risk of injuries associated with tackling is apparent, and the coach should have told your son how to do it.
We would need more information from you regarding your son’s accident to properly evaluate your son's case. Feel free to give me a call to discuss it @ 877.944.8396.