Case:We present a case of a 48-year-old man with a subacute tear of his left rectus femoris, repaired using Achilles tendon allograft. After fixation distally to the patella using suture anchors and a Krackow suture technique, the allograft was fixed proximally to the remnant rectus femoris tendon with multiple sutures in a variety of stitch configurations. The patient recovered excellently, regaining near-normal flexion and an intact straight leg raise without an extensor lag.Conclusion:The literature regarding repair of subacute and chronic rectus femoris ruptures is limited. We provide an additional option for operative repair of subacute and chronic ruptures using Achilles tendon allograft.