The muscle/tendon involved has not be specifically reported. When you refer to a groin injury with muscle/tendon completely torn from the bone, this usually involves the adductor longus
(labelled "al" below) as I've mentioned in previous posts. Another muscle tendon that can be torn, but is not usually referred to as "torn from the bone" is the rectus abdominis
(labelled "ra" below) muscle/tendon. This tendon inserts on the pubic bone very close to the same area that the adductor tendon is attached, except coming from the opposite direction. The Bassini or modified Bassini repair is commonly performed on the classic run-of-the-mill male groin hernia (I have performed many of these myself). This technique can also be incorporated in repair of a localized rectus abdominis muscle or tendon tear. In a classic hernia or a typical sports hernia defect repair, recovery can be as quickly as 4-6 weeks, but many times closer to 8 weeks . When this technique is applied to the repair of the abdominis rectus tendon tear, you can expect the recovery to be closer to the 3 month period......performance at that period, of course, cannot be guaranteed. And that excludes the potential occurrence of inherent surgical complications, or set backs due to too hurried non-fully rehabbed return.