According to the Denver Post, the deal would be worth $30 million, which would be the biggest contract given to a player with less than two years of major league service. The extension would surpass the six-year, $23.45 million deal that the Indians signed outfielder Grady Sizemore to in 2006.
The 23-year-old Tulowitzki helped the Rockies to their first World Series appearance in franchise history last season. Colorado fell to the Boston Red Sox in the Fall Classic in four straight games.
Tulowitzki, second to Milwaukee's Ryan Braun in the NL Rookie of the Year voting, hit .291 with 24 home runs and 99 RBI in 155 games last year. He also led also led major league shortstops with a .987 fielding percentage, 561 assists and 114 double plays turned.