Shortstop Troy Tulowitzki's six-year, $30 million contract extension, the largest ever granted a Major League player with fewer than two years of experience, is a physical away from being complete, according to baseball sources. The extension would surpass the six-year, $23.45 million deal that the Indians signed outfielder Grady Sizemore to in 2006. Tulowitzki's deal also would include a club option for 2013. Tulowitzki, 23, also becomes the fourth player in the Rockies' young core to sign a multiyear contract that would cover all of his arbitration years, and the third with a contract that would extend into his free agency.