The Division I men's college lacrosse season seems to start earlier and earlier every year, and this time that's a bonus, because 2013 might be the most anticipated campaign in the history of the sport. A slew of rules changes, including the introduction of a shot clock, and the return of decorated Cornell attackman Rob Pannell are among the major storylines. After a change-laden offseason, here's an A-to-Z primer to get you up to speed:

—Quint Kessenich, For The Baltimore Sun