Yes, it is absolutely reasonable to put on that much weight. Sometimes really little lepomis grow at an almost stunning rate when there is ample big forage available....like YOY fatheads. \:\)

Excellent observations. It is my personal belief that if you can get lepomis on a fish diet they will have the very best chance of growing huge. This also stands true for lepomis with lots and lots of bigger sized invertebrates available throughout the year.

Holding a redear sunfish is like running with scissors.