Last night's bout between Mike Baker and David Carter, the 10-round main event at the Crystal City Hyatt Regency, was canceled after Baker informed promoter Ed Guido that he had ptomaine poisoning from lunch and could not fight.

Baker, a middleweight from Arlington who had hoped to get an Atlantic City fight with a victory here, was suspended indefinitely, pending a hearing, by the Virginia Boxing Commission.

Junior middleweight Billy Hill won a close decision over Tony Ojo of Falls Church in the four-rounder that became the main event. Hill, a 146-pounder from the District, consistently connected with his right hook to raise his record to 5-2-2.

In the opening fight, middleweight David Todt (5-0) of Hillcrest knocked out Saxton Boykyn (7-5) of Philadelphia with a hard right to the head only two minutes into the first round of a scheduled six.

In the second six-round fight, lightweight Darryl Tyson of Washington remained undefeated (3-0) by knocking out Hillcrest's Edward Carberry with a right hook to the head at 2:50 of the third round.

Washington lightweight Morice Saalakan (6-3-3) won a decision over Richmond's Ira Robinson (6-3), and Falls Church welterweight Mike James knocked out Philadelphia's Ronnie Super 2:11 into the bout.