KEMBA WALKER (Last: 2 ⬆️) Walker's importance to Boston's offense was very much confirmed when he sat out three games recently due to the flu. The Celtics own an offensive rating of 116.5 during Walker's 1,049 minutes of court time and it plummets to a team-worst 102.5 in the 732 minutes without him. To give you context on those numbers, the Mavericks lead the NBA with an offensive rating of 115.3, while the Golden State Warriors own the NBA's worst mark at 102.7.