The 12 Greatest Raptors in history, ranked by Player Efficiency Rating (PER)

No. 12: Jose Calderon, 17.5

In 2005 the Toronto Raptors' front office managed to entice EuroLeague star point guard Jose Calderon to sign a contract to join the NBA. The 24-year old Spaniard became one of the great undrafted free agent success stories, earning votes for Most Improved Player by his second season.

Calderon provided a steady hand as a passer, averaging 7.2 assists to just 1.7 turnovers in Toronto. Across eight seasons north of the border he racked up 3,770 assists, second only to Kyle Lowry in franchise history. He was a modest scorer, averaging just 10.0 points per game in his 525 games for the Raptors.

Where Calderon really stood out was as a shooter. He developed his 3-point shot over his early years in the NBA and by his third year he was hitting 42.9 percent from deep, and would eventually notch a 40.7 percent career mark from outside the arc. Even more impressive, Calderon was a deadeye free-throw shooter, once hitting 87-straight free throws, the second-longest streak in NBA history, and setting the NBA record for highest free-throw percentage in a season at 98.1 percent; he hit 151 of his 154 free throws that year.

Calderon just missed qualifying for the vaunted "50-40-90" shooting club, hitting the marks in his third season without hitting the volume of free-throw attempts required, then falling just a whisper short his fourth season shooting 49.7 percent from the field. His combination of efficiency and passing without turnovers boosted him up the ranks of the PER leaderboard and landed him 12th on this list.