I reccommend locking the roster if Possible. Assuming 100% that this guy quit. I say lock it because he might do something really stupid that ruins the league and that is Drop All his Players, to a lesser extent Bench all his players. He could also try and trade his best players to his friends (if it is a league with friends). All of these suck and I have experianced all of them in leagues I've been in.
I say set the roster with his best players and Lock it.
As to the re-draft, it unbalances the league IMO, because he only has 1 1st rounder, 1 2nd rounder......and I doun't think its fair that 1 team gets a bonus 1st rounder while others get a 8th rounder, which doesn't usually help on a top team. It puts less emphises on the 1st half of the season. Those top teams worked hard for there record.
If its a keeper, throwing all his players back into the pot for next year would work (if you can't find a replacement), just not mid-season.
I believe there ought to be a constitutional amendment outlawing Astroturf and the designated hitter. -Crash Davis
Stewie : [watching a baseball game] Why does that man drop his club before he runs? I would bring it with me!