Alex Mack retiring wasnt much of a surprise.The 49ers kept his status relatively in the dark despite knowing which way Mack was leaning. Mack has spent 13 seasons in the NFL and is 36 years old. Considering how there was no answer yet about his future and seeing how hes been traveling, it became pretty clear he was hanging Joel Embiid Jersey up his cleats. What isnt clear are his specific...