Complex sentence: The injury is believed by some to have been caused by an illegal hit from Al Wallace who was later fined by the NFL, however, Simms was complaining of pain and shortness of breath, symptoms of a spleen issue, prior to the hit.
Split into simpler sentences: The injury is believed by some to have been caused by an illegal hit from Al Wallace who was later fined by the NFL. However, Simms was complaining of pain and shortness of breath, symptoms of a spleen issue, prior to the hit.