Ringside seats were only $4 last night at Suitland High School, but the Potomac Valley Association Amateur Boxing Federation senior championships provided $500 action as 12 boxers advanced to the American Boxing Federation regionals, May 8 and 9 at Westminster, Md.

Controversy again surrounded Region 4 Golden Glove champion Maurice Blocker's victory in the 147-pound class.

Blocker, controlling his fight with Robert Moore, connected with a shot to Moore's belt. Moore backed away in pain and was unable to continue. Protesting vigorously, Moore's coach, Henry Thomas, claimed the punch was low. The referee ruled a clean blow and disqualified Moore.

Two fights drew loud ovations from the sparse crowd: George Cupp's toe-to-toe battle with Michael Lee and Anthony River's 125-pound victory over Marlin Thompson.

In the 165-pound championship, Cupp and Lee exchanged cannon shots for three rounds. Cupp just managed to land a few more.

Rivers and Moore abandoned defense at the opening bell and whaled each other throughout their title fight. A staggering Rivers right in the final round earned him the decision.

In the novice division, Abraham Johnson's Ham Athletic Club dominated, winning three of four decisions. The highlight bout was for the 139-pound championship between Bruce Williams of PCB-11 and Metro Athletic Club Michael Doudy. Williams repeatedly jarred Doudy, bloodying his nose and mouth, forcing two standing eight counts, and won the decision.