Saints RB is back in the game

New Orleans Saints running back Tim Hightower (34) works out during an NFL football organized team activity in Metairie, La., Thursday, June 4, 2015. (AP Photo/Gerald Herbert)Tim Hightower had enough.

He tried to maintain a positive outlook and find new ways to keep hope alive during his nearly four-year comeback from a torn ACL. But his knee seemed to keep finding even newer ways to trip him up, and on this day he considered hanging it up.

Though it wasn’t a common occurence, it wasn’t the first time the thought slithered from the back of his mind, constricting him with doubt. He was getting too old. He had been out of the game for too long to make it back in. His knee wouldn’t cooperate,…