The 10 Greatest Timberwolves in history, ranked by Player Efficiency Rating (PER)

4. Al Jefferson - 21.5

Al Jefferson, or "Big Al," as he's commonly referred to is a classic, pre-modern era big man. He entered the NBA at the perfect time. Although if were to begin play in the 1980s, he'd perhaps be a Hall of Famer. The former center's game was predicated on his phenomenal post-game.

At 6-foot-10 and nearly 300 pounds, Jefferson used his elite footwork and wide array of moves to dominate from the low post. The big man was one of the last prep-to-pro players. He entered the 2004 draft by way of Prentiss High School.

The Boston Celtics took a swing on the 19-year-old center, drafting him with the 15th overall pick. After three seasons in Boston, Jefferson was sent to Minnesota as the centerpiece in the trade for Garnett. As soon as Jefferson hit the hardwood in Minneapolis, he began to shine.

In his first year in Minnesota, Jefferson averaged 21.0 points and 11.1 rebounds per game. The next season, Jefferson nearly replicated his statistical output. He put up 23.1 points, 11.0 rebounds, and 1.7 blocks per game. Although his contributions didn't lead to many wins, he was a vital part of the organization for all three seasons.

In Jefferson's third season playing for the Wolves, his averages dropped to 17.1 points and 9.3 rebounds per game. The dip in production can largely be accredited to a torn ACL which Jefferson had suffered a year prior.

After three seasons in Minnesota, Jefferson's Timberwolves career came to a close as he was shipped to the Jazz in exchange for Kosta Koufus and a pair of first-rounders. From there, Jefferson continued to find success, at every stop.

He performed well for the Jazz, before signing a big contract with the Charlotte Bobcats. As a member of the Bobcats-turned-Hornets, he made his first and only All-NBA team. From there, Jefferson signed a final contract with the Indiana Pacers before retiring in 2019.