As if facing Greater Atlanta Christian and Air Force commit Charlie O’Briant wasn’t enough of a challenge, North Hall had to do it with a key player sidelined for most of the game. Starting point guard Justin Rabb suffered an apparent head injury late in the first quarter Tuesday night, an unfortunate turn Trojans coach Tyler Sanders said played a significant role in the his team’s 52-45 loss to open their Region 7-AAA schedule. Rabb’s absence was most apparent during a frustrating third quarter in which the Spartans (3-1, 1-0 Region 7-AAA) used a 15-3 run to stretch their two-point halftime lead.