Dallas Mavericks' Jason Terry celebrates after sinking a three pointer against the Los Angeles Lakers during Game 4 of the NBA Western Conference semi-final basketball playoff in Dallas, Texas, May 8, 2011. (Xinhua/Reuters Photo)

The Dallas Mavericks completed a 4-0 second round sweep of the Los Angeles Lakers with a 122-86 rout of the two-time defending champions.

Dallas tied an NBA play-off record with 20 three-pointers to land the knockout blow on the aging and weary Lakers and send 11-time NBA champion coach Phil Jackson into retirement on a sour note.

Jason Terry drained nine three-pointers of his own and 32 points to send the Mavericks into the Western Conference Finals for the first time since 2006.

With Terry leading the way, Dallas hit a barrage of 3-pointers to go ahead by 24 points at halftime. When he made 3s on consecutive possessions early in the third quarter, Los Angeles knew it wasn't going to come back in this game or the series.

Things got ugly early in the fourth quarter, with vicious, frustration-fueled cheap shots by Lamar Odom and Andrew Bynum getting them ejected 45 seconds apart. But at game's end, Dallas coaches, players and team owner Mark Cuban lined up to bid farewell to the Zen Master.

Dallas will host either Oklahoma City or Memphis in the conference finals. The Grizzlies lead the Thunder 2-1 going into Game 4 on Monday night. The next round likely won't start before next Sunday, a layoff that could pay huge dividends for a roster filled with players in their 30s.

Bryant finished 7 of 18 for 17 points. Shannon Brown was Los Angeles' next-best scorer with 15. Pau Gasol's lost postseason continued, too; he had 10 points and eight rebounds.