Sue Ogrocki/Associated Press
Starter: Anthony Morrow
Donovan hasn't made a decision on Russell Westbrook's backcourt mate, but Morrow would be the most logical choice. He's one of the league's most lethal outside shooters, having finished in the top 10 in three-point shooting percentage five times during his seven-year career, which fits Donovan's need for floor spacing.
He doesn't require a ton of touches and excels in catch-and-shoot situations, where he drained a ridiculous 65.1 percent of his shots last season, per NBA.com. Defensively, the Thunder also allowed just 102.1 points per 100 possessions with Morrow on the court in 2014-15, which was fifth-best among players on the current roster.
By opting for Morrow, the Thunder would have a three-point option that opposing defenses always have to account for.
Backup: Dion Waiters
When you look at Waiters' numbers last season, you can make a case for his placement among the Thunder's first five. He scored 14.6 points in 23 starts while shooting 41.3 percent from the field and 36.7 percent from three. As a reserve, his scoring dipped to 10.6 points per game, converting 38.8 percent from the field and 26.3 percent from deep, per NBA.com.
However, Waiters is a ball-dominant guard with a career 32.6 percent mark from downtown. He's at his best as a slasher who attacks the rim, which creates redundancy in the offense when paired with Westbrook. He also commands a lot of shots, averaging 13.1 field-goal attempts per game during his first three years in the league.
With a starting rotation that already includes Durant, Westbrook and Ibaka, there's not much need for a guard who needs the ball in his hands to be effective. As a sixth man, Waiters could lead the offensive charge and provide a spark off the bench.
It may not be the ideal way to build his value going into restricted free agency next summer, but it's the role he's best suited to play in OKC.
Third String: Andre Roberson
Roberson made 65 starts last season as he fit Scott Brooks' preference for a defensive-minded shooting guard in the starting rotation. He held opponents to just 39.8 percent shooting from the field, and Oklahoma City posted a defensive rating of 100.1 with him on the floor, as opposed to 104.7 when he was off of it.
However, Brooks is gone, and Roberson's underwhelming offensive numbers (3.4 points per game, 24.7 percent from three) make it tough to justify playing time in Donovan's system. There will be times when Roberson's perimeter defense will be needed, but unless he improves considerably at the other end, it's hard to fathom him coming close to the 19.2 minutes he logged per game last season.
Fourth String: Josh Huestis
The good news for Huestis, the NBA's first domestic draft-and-stash opening-round selection, is OKC is saving its final roster spot for him after trading away Jeremy Lamb and Perry Jones, per ESPN.com's Marc Stein. The bad news is, in a crowded backcourt, playing time will be hard to find.
Much like Roberson, Huestis is a 6'7" swingman with a knack for putting the clamps on opposing scorers, but he hasn't shown much in the scoring department. In 44 D-League games last season, he contributed 10.6 points and shot just 31.6 percent from behind the arc.
Huestis will get a chance to show what he can do in the pros, but with so many options ahead of him, his opportunities will be limited this season.