The Dallas Mavericks and point guard Devin Harris agreed to a five-year contract extension today. Harris, the fifth pick of the 2004 NBA Draft, has spent his entire three-year career with the Mavericks after being acquired from Washington in draft-day trade.

?I feel good about the commitment for another five years,? Harris said after a morning workout American Airlines Center practice court. ?Hopefully now we can run with it.?

Harris averaged career highs last season in points (10.2), assists (3.7), rebounds (2.5), steals (1.2) and minutes (26.0). He also played in 80 games, with 61 starts, shot 49.2 percent from the field and 82.4 percent from the line ? all career bests.

The five-year extension, which begins after this season, locks Harris up through 2012-13. Harris has played in a key role in the Mavericks reaching the 2006 NBA Finals and finishing with the NBA?s best record last season.

?Devin is a vital part of our core and has played a key role in our success,? Mavericks president of basketball operations Donnie Nelson said. ?We are excited about his future in a Mavericks uniform.?