They're saying on ESPN that if he gets surgery to fix his torn labrum he'll likely be out for the rest of the year. Tough break for him and Orlando, for as well as they're doing. I bet they wish they still had Carlos Arroyo.
They're lucky that Mike Brown is the East ASG coach, so you're right Mo will probably be selected. If the coach was SVG or Doc they'd probably choose Hedo and Ray Allen respectively.
Yea I kind of find it funny that Allen IMO is playing the best out of the big 3, yet he isn't in the game and they are because their names are KG and Paul Pierce. Paul Pierce has had a hell of a shitty year.
The coach doesn't select the replacement player, Stern does. If the injured player is a starter, then it is the coach's call who to start in place of the starter, as he doesn't have to start the replacement player.