Lumps and lessons for Colts rookies

IndyStar's Zak Keefer and Stephen Holder discuss Indianapolis Colts training camp. The big question: How is Andrew Luck doing?Clark Wade/IndyStar

Buy PhotoANDERSON — Ah, the horn. Finally. Practice is over. Time to eat, relax, unwind. Andrew Luck signs a few autographs. T.Y. Hilton poses for a few photos. Some of their Indianapolis Colts teammates stroll towards the end zone, find their family, kiss their wife and scoop up their toddler.

Antonio Morrison does not. For him, the end of practice does not signal the end of work. While his teammates hop on golf carts and head for the dorm rooms at Anderson University, the rookie linebacker toils alone on a side field, heeding the instruction of…