Tatu scored two goals, giving him a club-record 74 for season, as the Dallas Sidekicks damaged the Wichita Wings' playoff chances with an 8-4 victory Thursday night in Dallas.
A victory would have lifted Wichita to within half a game of third-place Baltimore in the Major Soccer League Eastern Division.
Tatu tied his Dallas record for most goals in a season, 73, late in third period on a shootout after being given a second chance when goalie Kris Peat's hand touched the ball outside the box. He scored his 74th early in the fourth period.
Tatu, who leads the league in scoring, already had erased Sidekicks season records for assists and points earlier this season.
Sidekicks defender Troy Snyder scored twice within 2 minutes, 42 seconds late in the third period to erase a 3-2 Wichita lead, and the Wings didn't score again.
In other games, Paul Dougherty scored three goals and Branko Segota added two goals and an assist as the San Diego Sockers beat the Tacoma Stars, 11-2, at home.
The Sockers, who have a 3 1/2 -game lead over St. Louis, need two more victories to clinch the MSL West championship. San Diego expanded a 4-1 halftime lead by scoring four goals in the third quarter.
Meanwhile Jan Goossens' two goals and three assists led the Kansas City Comets to a 9-5 win over the St. Louis Storm in Kansas City.
The Comets took a 6-2 lead into the fourth quarter. A comeback by the Storm was led by Preki's second goal at 2:02. Then Emil Dragicevic scored 31 seconds later for his 12th goal of the season, and Preki scored a shoot-out goal of 8:20 to bring the Storm within one at 6-5. It was Preki's seventh hat trick of the season.