All-Time #NBArank enters the Top 20.

To create All-Time #NBArank, we put together a ballot with the 150 greatest players ever. Then our ESPN expert panel voted on thousands of head-to-head matchups, with voting based on both peak performance and career value. The result is our all-time NBA Top 100.

We have already announced players 21-25, 26-30, 31-35, 36-40, 41-45, 46-50, 51-60, 61-70, 71-80, 81-90 and 91-100. The top 100 rollout will conclude next week.

Also, check out our positional rankings of the 10 best point guards, shooting guards, small forwards, power forwards and centers of all time.

All-Time #NBArank: 16-20

If you want to get involved in the discussion, #NBArank is the Twitter hashtag to use. You also can follow along @ESPNNBA and on Facebook.

Karl Malone

Rocky Widner/NBAE/Getty Images

Position

Power forward

Teams

Utah Jazz (1985-2003), Los Angeles Lakers (2003-2004)

Honors

Two-time MVP (1996-97, 1998-99), 14-time All-Star, 14-time All-NBA selection, four-time All-D selection, Hall of Fame

Championships

None

Career stats

25.0 PPG, 10.1 RPG, 3.6 APG, .516 FG%

Nickname

The Mailman

Did you know?

Malone is the only player in NBA history to be named First Team All-NBA in 11 consecutive seasons. -- ESPN Stats & Info

Dirk Nowitzki

Danny Bollinger/NBAE/Getty Images

Position

Power forward

Teams

Dallas Mavericks (1998-present)

Honors

MVP (2006-07), Finals MVP (2010-11), 13-time All-Star, 12-time All-NBA selection

Championships

One (2011)

Career stats

22.1 PPG, 7.9 RPG, 2.6 APG, .475 FG%

Did you know?

Nowitzki is the NBA's all-time leader in 3-point field goals, free throws and free throw percentage (minimum 10 attempts) among players 7 feet or taller. He has made over 1,000 more 3-pointers than the next most prolific 7-foot shooter in NBA history (Andrea Bargnani). -- ESPN Stats & Info

Charles Barkley

Rocky Widner/NBAE/Getty Images

Position

Power forward

Teams

Philadelphia 76ers (1984-1992), Phoenix Suns (1992-1996), Houston Rockets (1996-2000)

Honors

MVP (1992-93), 11-time All-Star, 11-time All-NBA selection, Hall of Fame

Championships

None

Career stats

22.1 PPG, 11.7 RPG, 1.5 SPG, .541 FG%

Nickname

Sir Charles, the Round Mound of Rebound, The Chuckster

Did you know?

In the past 50 seasons, Barkley and Kareem Abdul-Jabbar are the only players to average 25 points, 12 rebounds and 5 assists in a single season. Barkley did so on his way to winning the MVP in 1992-93 with the Suns. -- ESPN Stats & Info

John Stockton

Dick Raphael/NBAE/Getty Images)

Position

Point guard

Teams

Utah Jazz (1984-2003)

Honors

10-time All-Star, 11-time All-NBA selection, five-time All-D selection, Hall of Fame

Championships

None

Career stats

13.1 PPG, 10.5 APG, 2.2 SPG, .384 3P%

Did you know?

The NBA's all-time leader in assists and steals, Stockton led the NBA in assists per game for nine consecutive seasons between 1987 and 1996. No other player in NBA history has led the NBA in assists per game for nine seasons total. Stockton would still be the NBA's all-time assist leader even if he had not played his final six seasons. -- ESPN Stats & Info

David Robinson

Noah Graham/NBAE/Getty Images

Position

Center

Teams

San Antonio Spurs (1989-2003)

Honors

MVP (1994-95), 10-time All-Star, 10-time All-NBA selection, eight-time All-D selection, Defensive Player of the Year (1991-92), Rookie of the Year (1989-90), Hall of Fame

Championships

2 (1999, 2003)

Career stats

21.1 PPG, 10.6 RPG, 3.0 BPG, .518 FG%

Nickname

The Admiral

Did you know?

Robinson and Hakeem Olajuwon are the only players in NBA history to average 20 points, 10 rebounds and 3 blocks per game for their careers. Robinson averaged over four blocks and two steals per game during the 1991-92 season, an achievement reached only one other time since steals and blocks became official (Olajuwon in 1989-90). -- ESPN Stats & Info