I'm fairly open, but would probably lean towards something more stylized than photorealistic. This shirt will be given to participants in a weight lifting meet. I would like to see a cool looking T. Rex. It can be full body, a portrait, something straight-on, at an angle, or in profile. There are lots of shots of T. Rex with his mouth open and roaring. That can work, but something with jaws closed would be cool, too.
The shirt needs to feature a Tyrannosaurus Rex. It also needs to have the words "Starting Strength Fall Classic", "Oakland, CA", and the year "2016" on it. If it works in the context of the design, including the words "Squat, Press, Deadlift" in there would be nice. However, if that makes things too crowded, that part can be omitted.
The Tyrannosaurus should not be eating anybody, nor should he be holding a barbell. In fact, I'd rather not have a barbell or plates featured in the logo at all. I am not interested in anything gory, either. I am quite familiar with the T. Rex clip art out there via a Google search. I am looking for something better than that. Please do not use any images to which you do not have rights.