Mark Eaton was a 4th round draft pick for the Jazz who went on to hold the NBA records for most blocks in a season (456) and for career average in blocks per game (3.5). He led the league in Blocks four times (83-84, 84-85, 86-87 and 87-88).
In his rookie season (82-83), he came off the bench to record his first triple-double with 12 points, 14 rebounds, and 12 blocks. He also had 6 assists that game, close enough to say he nearly had a quadruple-double.
In the 84-85 season he recorded a triple-double with 12 points, 20 rebounds, and 14 blocks. In the same season he became the first player to block 10 shots in a playoff game and received the NBA Defensive Player of the Year award for the first time.
In the 86-87 season he had a triple-double with 15 points, 20 rebounds, and 12 blocks. In his career he recorded 6 triple-doubles, all of points, rebounds and blocks.
He was selected in one All-Star game (1989) in spite of having no offensive game at all, and was named the NBA Defensive Player of the Year for the second time the same season.
He holds the league record for most games with double-figure blocks (19).
His #53 jersey has been retired by the Utah Jazz, with whom he played his entire career.
Mark Eaton was left handed, and this may have helped him to be such an effective shot-blocker, because he could use his dominant hand to defend against predominantly right-handed shooters. The fact he was 7'4" tall probably helped too.