Who starts at SG for Portland?

Wesley Matthews didn't just start all 69 games he played for Portland last season, he averaged 34.8 minutes in those contests. That number ranked No. 35 in all the NBA, ahead of guys like Andre Iguodala, Kyrie Irving and Dwyane Wade. But now that Mo Williams has signed with the Trail Blazers on a two-year deal with a player option in the second year, that means at least for a season McCollum figures to get most of his minutes at shooting guard. And with the talent that is McCollum at the two, it begs the question of whether he or Matthews will be better served coming off the bench.