No, he's not clearly anything. The Spurs' top defender is a rotating cast depending on the player who needs guarding. Leonard is not the top option against most players, or a plurality of players. It's hard to say the Spurs view him as the clear-cut top dog in that category. Think back to all the tough match-ups this season and think how many of them Leonard guarded. From my count, he only checked Joe Johnson, Kobe, Gay, Durant and Paul George. That's a great list of players to be able to guard, for sure. But Eric Gordan, Moe Williams, Chris Paul, Kyrie Irving, and other guards went to other players. In crunch time, he rarely got the assignment, either. He's not like Bowen who would guard the best perimeter player regardless of position. Leonard guards one type of player really well, but struggles against most other types. He's great in help defense, which is another great value.