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Carter has had a great career filled with highlights and flashy dunks, but that has never translated into much playoff success. In his seven seasons as the franchise player for the Raptors, he only lead them to the playoffs twice.
He has never lead a team past the second round round of the playoffs, and in the season he made it to the Eastern Conference Finals, it was on a team lead by Dwight Howard. Although he has had his shortcomings like many other superstars in his time, he is still one of the greatest players of the 2000's generation.
Formerly known as "Air Canada," Carter was one of the most explosive athletes of his time. His combination of jumping ability and size led many to consider him as the greatest dunker of all time.
He's not in the league right now---which is why he's not on the list---but he definitely deserves an honorable mention. McGrady is another player who hasn't found much playoff success. He only passed the first round once in 2009, and didn't even play in those games due to injury.
In the seven seasons when he was completely healthy, McGrady's individual dominance was only matched by Kobe Bryant. In his prime, McGrady may have even been better than Bryant, but in recent times; however, injuries have slowed him down and he struggled to even stay in the NBA.
From here on out, McGrady will never be able to match his production in the early 2000's even if he does find a spot back in the league again. But there is little doubt about McGrady was one of the most talented and versatile offensive players of his generation.
Williams was in a good situation in Utah, a perennial playoff contender who were good enough to compete, but never could break into the category of elite Western Conference teams like the San Antonio Spurs and Los Angeles Lakers.
For the past 5 seasons, Williams and Chris Paul were the considered 1A and 1B as the top point guard in the league. Now; however, Paul is undeniably the best point guard, and Williams is having one of the worst seasons in his career.
Nothing should be taken away from Williams' accomplishments though, as he still seeks his first championship on a stacked (but overpaid) Brooklyn Nets team.